For about the past year, my periods have started with dark brown spotting that lasts from 4-6 days then pretty heavy normal bleeding for 3-4 days. More often than not, I would also get an upset stomache, like nausea, a couple days to a week before i started spotting that would stop around the time I started spotting. Now I've been spotting for about 3 weeks straight. It started when it should have but hasn't stopped and I never started bleeding normally. About a week ago, I started getting the upset stomache like I have been lately before I would start spotting, which if I wasn't still spotting, would feel normal because I should be starting my period soon.