Just a stupid question!

Ok so I started my period a week early and I'm always very heavy when I start but the strange thing is I'm very light and that's not normal for me at all. My bf and I are ttc could I be pregnant now if my period is so off? This didn't happen with my last child or not that I recall anyway.. Lol! I know it's a dumb question and I'm probably not pregnant.. Wishful thinking .. Lol!