Hey , jw

Hey , jw so I have a regular short cycle it’s like a 23 day cycle give or tak a few days , always. I normally bleed heavy for 3 maybe 4 days . So this is my regular period experience . So this month I only bleed 2 day heavy and had some bright red and very dark red clots . I never have clots . Then I spotted for three days brown always and now I whole 11 days into my period I start bleeding again . I’d say light to medium black blood. I know blood probably can’t turn black but it’s as close to it as can be . My boyfriend and I broke up like two months ago and I don’t believe I am pregnant. I did have a neck and chest and chin rash about a month ago and tried five days of steroid which didn’t help then doxy…. Antibiotic for 5 days . Could this be why ? I’ve been on this stuff before for skin problems and inflammation and never had this.