I am 19 years old. I have had regular periods since I was 11. As I got older my periods shortened from 7 days to 4 with spotting on the 5th. My last period was normal. 7 days after my period I noticed bright red blood when I wiped, lasting for 3 days. It did not show up on a pad, just when I wiped. This happened around the time that I usually ovalate, and I did not ovalate after it happened. Also, 7 or 8 days before I saw the blood, I finished a 2 month cycle of tetracycline. My next period was right on time. It seemed unusally light at first, but then normal. I stopped bleeding for about a day and then started again. It has been like a normal period, just oddly timed. I have not experienced any cramping, and I am not on any medications, including birth control. I am planning a year long study abroad trip and I hate my summer job. My diet has been a little unhealthy lately, but I am not overweight, and I never have been. I exercise regularly. Could this be stressed related? Is this a normal occurence?