I’m with a man who I’ve been seeing for a couple of days a week for a few months now. The sex is absolutely amazing - I’ve not been with many people and I genuinely can’t believe I’ve been missing out on this for so much of my life.
Anyway, I stayed at his last night and we had sex this morning. He always, always makes me orgasm before he has sex with me. He has said it makes him relax more as then he can really enjoy himself shagging me knowing that I’ve already cum (although he normally makes me orgasm again during sex as well 
).
For some reason, just before he cums he gets very, very hard and bigger. He is probably on the smaller size of average but for about 30 seconds to a minute before he cums much bigger. This morning he had my ankles on his shoulders and leant right into me just as he started to get a lot harder. I yelped as it suddenly really hurt me and tried to put my hands in between myself and his pelvis so he couldn’t go so deep but he moved my hands and pinned them to my sides. I quite urgently said ‘stop, you’re really hurting me’ and he said ‘I’m nearly done’. I grit my teeth and it lasts a few more thrusts but as soon as he’s cum I start sobbing and shaking. He was immediately apologetic and gave me a cuddle and said he didn’t realise I was properly hurt.
I had to leave a few minutes later and it was all very awkward as I could barely walk. I get home, have a bath and have a hot water bottle on my tummy but I’m in so much pain. No blood but I feel really bruised on the inside. Like really horrible period pain.
He’s messaged me a few times asking if I’m alright, apologising, saying that it would never happen again, that he just got caught up in the moment and if he knew he was properly hurting me he would have stopped immediately. I don’t think he did it on purpose and the whole thing probably only lasted 20-30 seconds.
What should I do? I really like him, love shagging him and am falling head over heels for him. I do believe he did it accidentally and it won’t happen again.