Late pill and lost condom?

Lizzie
Alright, so my period has been all sorts of messed up since starting on microgestin fe last year. I had some old blood spotting earlier(7/6), a week after I was supposed to get my period. The day after(7/7), I took my pill late, 10pm rather than 7am. The day after, my period started more so and gradually it's gotten heavier. My concern though, is yesterday(7/10) my boyfriend and I had sex. We used a condom, and he came but the condom ended up sliding off inside me. After FINALLY finding it and pulling it out it looking pretty twisted up and like everything was still inside. How concerned should we be though??!