Could I be pregnant?

I'm sexually active and on the pill. However, the first week of my new pack, I came back from another city that had a 2 hour difference from my home city so did I technically start late? I'm sexually active and today after we had sex he pulled out and he noticed something red when he was wiping his penis and checked me. I went home and wiped and it was pink. I heard spotting is a sign of pregnancy, but I'm not ready to raise a child. I'm suppose to have my period in 2 days. This has never happened to me before and I'm not expericising any other pregnancy symptoms. Help please.