Okay, My period has been late for this month, and I'm about to miss it completely. Just the other day I had light pink spotting. It didn't even last a whole day. I'm wondering if this is implantation bleeding, because I have been pregnant before? BUT, the last time I was pregnant the spotting lasted a couple of days, not a few minutes. Also, it took me a whole 4 weeks before I got a positive pregnancy test. When do you think I should test?