Tried Anal

My boyfriend used a lot of spit and only got a very little bit of the tip in (felt waaay more then that) and it hurt so bad. I pushed him out and I was crying/screaming. Worst pain I've ever felt before. Four days later still have a stinging ish pain one spot in there. It's not as bad as at first but I'm wondering if it's tore or it will fix itself in a couple days. But I'm worried.