Am i pregnant?!?!

So i had sex on july 2nd and my period isnt for another 11 days but i am still freaking out i had spotting quite a few times this week and ive bad to go pee alot this week but alot wont come out only a little will and then i will feel a burning sensation down there. Could it. Just be because i had sex multiple times that night or just because of my birth control? I have been taking birth control for almost two weeks and we use the pull out method. Please help me.