Hi 2016mommy2be,
Check out this article on save over the counter medicines in pregnancy, from Week 20 of our I'm Expecting app
http://www.medhelp.org/pregnancy-health/articles/Over-the-Counter-Meds-Whats-Safe--Whats-Not-in-Pregnancy/236
My doc gave me Fioricet which is safe for migraines while pregnant. Mine have really been acting up and I have a blood pressure monitor at home. My BP tends to run low, 100/60 +/- and it has not gone up.
Yes, it could be your blood pressure! Make sure to get it checked out. I had the same problem..
Lots of water. Avoid taking pills if you don't know why. It could be your blood pressure. Tell your doctor.
Yes regular tylenol and lots of water should do the trick