Friday I had red blood (period) I used one tampon and then Saturday there was just a tiny bit of brown on my 2nd tampon and today, nothing! It's like my period only lasted a day. Usually it lasts about 5 days with heavy flow on day 2. Any ideas about what's going on? I'm 24, TTC, about 30 lbs overweight, not particularly stressed out. I'm just confused and concerned.