I skipped 3 days (May 13th-15th 2017) on my birth control in the first week (days 6-8) and had unprotected sex on day 6 (May 13th). Today is May 22nd 2017 and I have not had a withdrawal bleed as yet. I've been spotting (mostly brown) since 12 a.m. yesterday morning (May 21st 2017) but only when I wipe.
My questions are:
1) Can this be the beginning of the withdrawal bleed or implantation bleeding?
2) I just took a pregnancy test and it was negative...should I take another test and when?