sexually active reaction

i'm kinda new to being this sexually active. i've neve fingered myself, used a tampon, or had anything up there and just recently my boyfriend and i kind of (wasn't full blow sex if yanno what i mean) had sex since i'm a virgin it really hurt and it was hard to just shove it in there and i bled but i thought that'd be the last of it?! so my boyfriend just only started fingering me with two fingers just the other week and i've bled eachtime he's fingered me when it was with two fingers and this time afterwards the next morning i was having brown discharge and there was a little bit of blood that came out and it kinda freaked me out because i thought this only happened after my period, so can anyone tell me whats normal and whats not? thx!