I have a 2 cm complex cyst and I had a similar experience with my period this past August. My next period was normal. I spoke to my gyne and she thought it was a multiple of causes, stress being number and also the cyst contributing to it. The best thing to do is to talk to your gyne about it.
Take care!
Yes, endometriosis sounds like a very strong probability. Med Help actually has a forum for that and you might benefit from asking the ladies there about some of their symptoms. Good luck!
I can't really comment on the cysts and pain with a cycle; however, I wanted to respond and ask you - have you seen a doctor yet? You may have had a cyst that burst, you might have endometriosis, many things. Only a doctor will be able to tell you exactly what is going on. On the right hand side of this page, is Health Pages, you can click on that and go to the cysts section for more information. Good Luck