I don't have much, but I do form cysts almost every cycle; they are different with everybody. for me, mine appear, and stay throughout my cycle, then shrink down or go away totally before my cycle ends. I have had to be put on birth control before for cysts, which was fine at the time because I wasn't TTC, to get them under control. I feel your pain girlie, I had a really bad cyst when I was pg with Gracie (grew her wings in June 2007), and I did end up going to the ER to rule out etopic the pain was so bad, and they went in with a camera to look at it, and said it wasn't cause for concern. But that's not to say you should make that call. I would advise you to have it looked at, to go in to your ob/gyn, because that level of pain nobody should deal with. I guess I have reached the point where my body changed from year to year hormonally lol, so it's hard for me to discern what calls for me to have it checked out, so I just don't take any chances. you could just fine, but then again you also might need to have it looked at since the pain is that bad. Just my opinion