Should i be concerned? *TMI sensitive*

I have gotten off birth control (this is the first month Without it) well I'm suppose to start my period Thursday but I know *TMI* but I went to the bathroom earlier I wiped and a tiny tiny bit of blood came on the paper.... Should I be concerned that it might start early? Or just let the nature come whenever (Thursday-ish) I'm not crampy or anything yet but should I look out for anything since it's the first month Without birth control? Advice...