Hi There,
First of all, at age 19, I would suggest a blood pregnancy test if you have not had one. Even on the pill, women can get pregnant. For any abnormal bleeding, one must think about that.
Second, bleeding can occur on the pill if you took another medication such as an antibiotic. that will temporarily change your liver metabolism which metabolizes the pill faster, and you get breakthrough bleeding.
As far as the ultrasound, yes, bowel is commonly seen. It is reasonable to recheck.
Please let us know how your next ultrasound goes.
best wishes
I don't have any advice because I am not in the medical field. This board seems to be an excellent board especially since actual Dr's monitor and respond to it. It may take a couple of days before you get a response however. In the interim, you may want to visit www.ivillage.com. Go to the message boards and then search for a gynecology board and/or ovarian board. The boards at ivillage are very,very active so you may get a response sooner but from an average person. Keep checking back here though for your answer from a Dr. Not much, but I hope this can help in the meantime.