Hello, and I hope I can help you today.
First of all, many women experience nausea and
diarrhea on the first day of their menstrual cycle. The substances that your body secretes during
menstruation to make your uterus contract, called
prostaglandins, have the side effect of making your GI contract as well, and many women experience diarrhea during a heavy and painful period for that reason.
Secondly,
pregnancy symptoms vary widely between women, and many of the same symptoms we commonly associate with pregnancy such as nausea,
bloating, breast tenderness,
headaches and irregular bleeding can also happen from an irregular menstrual cycle as well as pregnancy.
Therefore, it is impossible to know if someone is pregnant based on symptoms alone. The most common sign of pregnancy however, is missing your period.
However, with your history of narrow fallopian tubes, if you did conceive, there is an increased likelihood that you could have an ectopic or tubal pregnancy. Tubal pregnancy can be a dangerous medical situation, as if a pregnancy grows in the fallopian tube eventually it can burst your tube, causing
internal bleeding which can require emergency surgery.
So it would be in your best interest to do a pregnancy test just in case, because if you do find out you are pregnant it is extremely important to see a doctor right away to rule out an ectopic pregnancy.
But again, there is no reason to suspect that you are pregnant simply from having nausea during your period.
I hope I was able to adequately answer your question today and that my advice was helpful.
Best wishes,
Dr. Brown