So I've been sexually active but me & my boyfriend don't usually do it a lot we've only done it 7 times in the 6 months  we've been dating but only 5 times we use the pull out method ,  my period is weird now ever since I became sexually active & also the very fest time I took plan b because the condom broke which was 5 months ago but I've noticed ever since  I have less blood & I rarely have cramps does anyone knows what this could be ?