Holy SHIT OUCH!!

Well, the slip during sex today happened and Holy mf shit did it hurt! I was lying on my stomach while he was on top of me and it slipped, I'm much shorter (5ft2 vs 6ft2) and the angle was perfect if I wanted to do anal. I'm an anal virgin and my husband is super thick and big, God bless him❤️, and just the tip of the head went in and wow. A sudden stretching like sensation plus intense waves of a burning like feeling rushed on me- it hurt like a MF! I shook it off and we finished vaginally, but damn! My bum is still sore. He apologized and felt really bad, I told him not to worry and that I'm willing to try it again just slow, very slow and let me prep before hand. While we are fucking vaginally he will use his finger and stimulate my rectum and it feels great and I want to give it a go, but man that pain was intense.

any suggestions?