TMI but in so much pain !!! Advice please

Ingrid

So last night my man and I had dinner and a few drinks and the mood in the bedroom was pretty romantic. Candles ,music , massage the whole bit . He slid up from behind and instead of penetrating my lady bits he stabbed my anus . Now I do not judge but we don’t do butt stuff so this was a blindingly painful moment for me . He was horrified and felt so bad it was in error I know but holy shit ! We continued with the evening and went to sleep. I woke up in pain still and throughout the day ohs been uncomfortable. Worst is that I had to poo and I thought I was going to pass out on the toilet ! It feels swollen and like knives are stabbing inside . I took a pain reliever and it’s kind of taken the edge off but I need advice here ladies ! Please , how long should I expect this pain to last and when should I seek medical treatment if at all . Thanks in advance !

Hopefully this something I can laugh off one day but today is not that day 😭😭