Just want to see what everyone thinks.

Okay, my boyfriend and I never use any protection, and yes I know there is ALWAYS a possibility of getting pregnant. Anyway, the other night I was taking a shower, I could have sworn I started my period (TMI, a little​ blood ran down my leg, but it was like spotting type blood) So, thinking I started my period, I wore a tampon. Needless to say, I DIDNT start my period. I'm not sure when I'm supposed to get it, it's usually on track but last month it came at a weird time. I feel like I may be pregnant but I don't want to get my hopes up. Thoughts?? No rude comments please.