I have been having similar issues. I recently posted a similar question. Here was my post and my story...
"I was on Ortho Tri-Cyclen for several years before deciding to get pregnant with baby #2. Got pregnant, had the baby, and then at my 6 week postpartum appointment, I had ASCUS (Atypical Cells of Undetermined Significance) pap results. Doctor wasn’t concerned since it was HVP negative, so she just told me not to skip the next years annual.
I went back on the Ortho Tri-Cyclen after my 6 week appiontment, and immediately had problems. My face broke out, and I had mid-cycle bleeding/spotting every single month. After several months of this, I called my OB/GYN. They put me on Loestrin 24 FE. No spotting during the first month and a period that only lasted 3 days. I thought it was great. Then month #2 on the Loestrin, no spotting again, but I had no period at all!
I got online to do some research about Loestrin 24 FE, and I saw that women everywhere were not having periods while on this pill. One woman wrote she hadn’t had a period on 6 months. I know some woman would love that, but I prefer to have monthly periods. So, I decided to go back on the Ortho Tri-Cyclen until I have my annual doctor’s appointment in the beginning of July. This is my first month back on Ortho Tri-Cyclen , and unfortunately, I am having mid-cycle bleeding again. This month heavier than spotting.
I understand that your body and hormones change after having a baby, but this is all very frustrating. Has anyone had similar experiences? Any good suggestions on BC pills (although I know they work differently in different people)? Should I be concerned about the ASCUS pap results I had June 2007?"
So anyway, that is my story. Very similar to yours. I decided not to call my OB/GYN again and just to wait until I have my annual in the beginning of July. That way we can sit down together, and I can tell her what it is exactly that I want in a birth control pill. Also, perhaps we will know more after I have my pap.
Don't know if any of that helps, but at least you know you are not alone. I will tell you when I did call my OB/GYN her nurse told me the spotting was due to the pills. That doesn't mean you should have to just deal with it every month. I would call, and they can try to find a pill that works for you. It will probably be a long process. I know I am preparing myself for having to go through many months of sampling pills until I find the one that is right for me. They say you have to be on a pill for 3 months before you can tell how your body/emotions will react. :(
On a side note, just curious, what tests did they do when these issues started?