Spotting??? Second pregnancy

Ka

So I know there's this thing called spotting that looks like light pink when conceived but I'm 7weeks and 1 day today and about two weeks ago I had I think was spotting but was dark like period blood but was only there when I went to the bathroom that one time then it hasn't been back since but the dark looking blood wasn't heavy but wasn't exactly light PINK but was red was during the time I should've gotten my period.. what's going on? I scheduled an ultrasound for this week but now that I'm thinking about it I'm scared.. I read that you can feel what's called flutters as early as 5 weeks? I've been feeling some kind of sensation this week so is that a good sign?