TMI!!! last night sex

Last night my partner and I had sex 
We did it laying down the changed to me being on top then to me having my legs up in the air on hes shoulders 
But the thing is I was in so much pain (that's why we kept changing) and it felt like he was hitting something I could feel a lump that he was hitting he said he could feel it as well 
It hurt that much that we had to stop I felt so bad but I was almost crying 
There was no blood afterwards I had a shower and it burnt I was a little tight to begin with but then I relaxed 
I'm due for AF tomorrow could it be because that 
Never happened before 
I'm so scared and worried 
TTC for 8 months now