Health library
PMS or pregnancy: how can you tell the difference?
PMS or pregnancy? Compare early pregnancy symptoms and PMS signs, the few clues that differ, and when a pregnancy test gives you the answer.
Updated
In short
PMS or pregnancy: how can you tell the difference?
PMS and early pregnancy can feel almost the same, because sore breasts, tiredness, bloating, cramps and mood changes are common in both. PMS symptoms usually ease within 4 days after your period starts. A missed period, nausea, a metallic taste or light spotting around your due date lean toward pregnancy. The only way to know for sure is a pregnancy test.
Written by the Gyne team · Medical review: pending
Key takeaways
- Many early pregnancy symptoms are the same as PMS symptoms.
- A missed period is the most common first sign of pregnancy.
- PMS symptoms fade within a few days after your period starts.
- A home pregnancy test from the first day of your missed period gives you the answer.
- Severe mood symptoms before your period are worth talking to a doctor about.
Why do PMS and early pregnancy feel the same?
After ovulation, the hormone progesterone rises whether or not you're pregnant. If you're not pregnant, hormone levels then fall, and that drop is linked to PMS.
If you are pregnant, hormone levels keep rising. Early pregnancy symptoms usually start around 4 to 6 weeks of pregnancy, counted from the first day of your last period. That's right around when PMS would start too.
What symptoms do PMS and early pregnancy share?
These symptoms can happen with either one, so on their own they can't tell you which it is:
- Sore, swollen or tender breasts.
- Feeling very tired.
- Bloating or constipation.
- Mood changes, irritability or crying more easily.
- Headaches.
- Food cravings or changes in appetite.
- Mild cramping low in the belly.
What early pregnancy symptoms are not usually PMS?
Some signs are more typical of pregnancy than PMS. None of them proves you're pregnant, but they're a reason to test:
- A missed period.
- Feeling or being sick, at any time of day or night.
- A metallic taste in your mouth.
- Being more sensitive to certain smells.
- Losing interest in foods you usually enjoy.
- Needing to pee more often, without pain.
- More vaginal discharge, without soreness or itching.
- Light spotting around the time your period is due, called implantation bleeding.
How do you know if it's PMS?
PMS follows a pattern. Symptoms show up in the days before your period and ease within 4 days after it starts.
Doctors look for symptoms in the 5 days before your period, for at least 3 cycles in a row. Writing your symptoms down each day for 2 to 3 months shows whether yours follow that pattern.
Other conditions can feel like PMS, including depression, anxiety, thyroid disease and perimenopause. With depression or anxiety, symptoms are usually there all month and may get worse before a period.
When can a pregnancy test tell you for sure?
Most home tests work from the first day of your missed period. If you don't know when your period is due, test at least 21 days after unprotected sex.
Testing about a week after your missed period gives a more accurate result. If your test is negative and your period still doesn't come, test again a few days later.
Can you have PMS symptoms and still be pregnant?
Yes. Many people feel what seems like PMS in early pregnancy, including sore breasts and mild cramps. Feeling your usual PMS doesn't rule out pregnancy.
The reverse is also true. Some people with PMS feel tired, queasy or bloated and aren't pregnant. A test is the only reliable way to tell.
What if my period is late and my test is negative?
You may have tested too early, so test again in a few days. Stress, illness, travel, weight changes and conditions like PCOS or thyroid problems can also delay a period.
If you get two negative tests and your period still hasn't come, talk to your doctor.
When to see a doctor
- Your symptoms before your period are so severe they affect work, school or relationships.
- You feel hopeless or have thoughts of harming yourself: call or text 988 (the US crisis line) or your local crisis line.
- Your low mood or anxiety lasts all month, not just before your period.
- You've had two negative tests and your period still hasn't come, or you've missed three periods in a row.
- You have a positive test with severe belly pain, shoulder pain, heavy bleeding, or you feel faint: call 911 or your local emergency number.
How Gyne helps
If the same symptoms keep coming back before your period, Gyne shows you the pattern, and it keeps your pregnancy tests in one place with your cycle. If you're pregnant, it shows your week and keeps the danger signs one tap away.
PregnancyThis guide is general information, not medical advice. Only a doctor can diagnose a condition.