I used to have that same pain. While it is worriesome, I would venture to guess it is a somewhat common symptom. I would agree that it is probably the folicle stimulating hormone wrecking havoc on the ovaries trying to get them to respond! However, if you are really worried, you could always just check in with your doctor to see if they want you to come in for an exam. I took a lot of Advil and Tylenol going through the dreaded change. Hang in there!