Those who had spotting

Is it normal? I started spotting 2 days before my BFP and it has continued now for 4 days after I tested positive. It’s so extremely light I don’t know if I’d even count it as anything. It only is noticeable when I check inside or wipe (and only on occasion). I did put in a tampon for awhile to see and actually got a small streak of red blood? I’m worried because I’ve been reading about ectopic pregnancy. Is bleeding or spotting only serious when there’s a lot? I’ve read if it doesn’t fill a pad it’s normal but I’m so worried.