My boyfriend and I are sexually active. Very sexually active.

A couple of times we've had unprotected sex right before my period was coming. I've started yesterday, however, I've had some blood clots and red bleeding.. but it's mostly just been brown. It's never been this light and I'm scared. I'm too young to deal with all this and I understand I should have been more responsible with my actions involving unprotected sex.

Could this be implantation bleeding? Or just me worrying too much?

I'm too scared in asking my mothers help, his help, or his parents. I'm 19 and my current situation with money and medical insurance isn't the best. It's horrible.

Help.