I had sever endo which was removed. We were told by our FS to give it 6 months to TTC naturally and if nothing happened then try IVF. I also have blocked tubes though - but did manage to fall pregnant on the 7th month (just as we were about to start our IVF) but unfortunately miscarried that little bean.
We did IVF 7 months after that and fell pregnant first time.

Good luck sweets, it can happen.
Sue x