I am IBS-A mostly C and have had several gyno's tell me that my U was tilted. One replied, Wow! That is way back there! Kind of makes you wonder! You might be on to something Cara.
Cara, I also noticed that you mentioned that you get your period late each month. Did this start to happend after taking the pill. I used to get mine every 29 days like clockwork and now that I am off of the pill it comes like every 35-39 days. Prior to the pill I was regular as well. I do get really bad pain around that time of the month.