help?

okay. I'll start off by saying that I am sexually active. The other day when I was wiping after using the bathroom, I noticed that there was a small amount of light pink blood? I went to wipe again and there wasnt any more. I thought maybe my period was coming early but that wasnt the case. its been 5 days since then and I still haven't started. I don't know what to think of it. I'm not late yet. I still have a few days before I'm expected to start.