9 days late on cycle but MAJOR pain

I am 9 days late on my cycle...never have been in the past. And I am having major pain...I have been having only about 1 1/2 days of period anyway and then pain for quite awhile after that. Dr. said during my lap a week after my cycle ended that I was still bleeding inside. So is it possible to bleed solely inside?? I have always have a least a short period. Is this the retrograde bleeding..is it possibly to have just that and not a normal cycle?

Just as an fyi, I had a blood pregnancy test to rule that out and the pain I am having tonight feels like when I am on my cycle. I am just not having any come out...not even spotting. Anyone else have experience with this?

Sorry to hear your in so much pain.It sounds like you need to visit a gynae it could be ovarian cysts,endometriosis or polycystic ovary it doesnt seem to be normal to have the pain your having.
Take care