J.G.
S.,
I, too, was having similar problems with bleeding between periods and I thought I was pregnant or, just like you, that I must have a cyst or something wrong with my uterus/ovary/fallopian tubes/etc. I went to the doctor for a pregnancy test, ultrasound, and blood work and absolutely nothing abnormal showed up. I also became pregnant with my son while on Ortho Tri Cyclen Lo and I have heard consistently from my doctor and other mothers that women who have gotten pregnant while on the pill usuallly also have problems with cysts on their ovaries - I don't really understand the correlation but apparently there is some. The problem is that EVERY woman gets a cyst on the ovary that ovulates each month and this is normal, what isn't normal is when the cyst grows too large or is filled with blood -- in these cases doctors can often control it with the pill. However, once your body regulates itself to the hormones that the pill (or patch in your case) introduce into your body each month, you may again experience these abnormal cysts. The blood you are seeing may be from cysts that burst -- I have had this happen several times myself. Another sign that this could be your problem is if you can feel yourself ovulating - in other words if you get minimal cramping or uncomfortable feeling similar to your period but not as severe a couple weeks after your period, when you are not bleeding. My doctor told me that only 5% of women feel ovulation, but that statistic also ties in to the cysts and irregular bleeding. Sorry this is so long, but I don't think there is sufficient information out there about these kinds of issues and most doctors aren't either open enough or informed enough to discuss with their female patients. I'm sure you may be able to find some more info on the internet but be careful what you read because it often can scare you more than it does good. Hope you figure out whats going on and who knows it could be something completely different!! :)