strange bleeding?

[thestudyof.livejournal.com]

Hi everyone,
I'm on my second pack of bc (estrostep) and I take it every day at the same time. A couple weeks ago, I started having a burning sensation when I urinate. I still have that sensation now and I was prescribed antibiotics which I started today for a bladder infection. A few days ago, I started seeing small amounts of blood when I peed and then wiped. It has gotten heavier and now I have to wear a pad/tampon to be safe that it doesn't bleed through my pants. It looks/smells/feels like period blood. I'm not really sure what is going on because my period isn't due for another week. I've been having cramping and some minor backaches as well.

I had sex without a condom about three times last month, but I take my pill regularly at the same time. I'm really scared. I'm going to the doctor's on Saturday.

Thanks in advance.