Could I be pregnant?

(TMI Alert) So me and my boyfriend have sex with condoms. We use trojan ultra thin with lubricant and spermicide. After each time we have sex, there is always a thick goey substance coming out of me until I shower and clean it real good. Could that be sperm? Or is it just the mixture of my fluids, the lube, and the spermicide? We've checked a few times after to see if the condom broke and it didn't, but we don't check every time. I had my period two weeks ago today, and we've had sex twice since then.I did not check the condom either one of those times. Then a few minutes ago I went to the bathroom and when I wiped there was a little bit of blood. Could that be an implantation bleeding or just my body being weird?