Help!!!

Trinity

So I’m on birth control. But I’ve been taking meds for bronchitis. My boyfriend hasn’t been pulling out.. he does but when he feels like it. He’s came inside about 5 times now.. it hasn’t been long enough for me to have any pregnancy symptoms if I am. But what do i?! Could I be because the meds I’m on? Or could I be just because he has done it more than once?! Help!!!