Is something wrong?

When I had sex 4 the fist time it was a very painfull expierience, and all day my vagina was sore,I bled a little and he kept slipping out, and it was reallly hard to get in every time

nah, you're tight since it was your first time, its going to hurt, and you bled because your cherry was popped.

It's normal too feel pain the first time and it's also normal to be sore and bleed. If it was very painful then maybe you weren't wet enough, very nervous and-or he wasn't gentle enough. Also some women have a very thick hymen which could make the experience more painful when it tears. Wait a few days to see how you feel. If the pain continues, go see a doctor.

Alright, as far as the pain goes, totally normal. The slipping out could be happening for a few reasons. I know that when I first sleep with a girl, it's hard to really find our pace and move as one, and this can lead to awkward sex (it gets better I promise). Things like the guy thrusting to aggressively or maybe having a penis on the smaller side could be the case too, but with a little practice you guys will be having mind-blowing sex in no time, just be patient (and be safe).

could be slipping out because he pulled to far back

omg, your lovly lady... please tell me your first time was your boyfriend, and not the dude you cheated on him with...