What do I do?!

So basically me and my boyfriend were having sex, and he accidentally pulled out to far and what was suppose to happen was him “slamming” into me, but what ACTUALLY happened was that his dick slammed right into my butthole, it started bleeding and it hurts sooo fucking much! I’m writing this the next day, and it hurts to move, sneeze (I have really bad allergies) and just to walk in general 😭😭😭

What do I do? Will the pain go away or do I need to buy something to stop the pain?