Random period or worse?

So I am only halfway through my current cycle, had my last period two weeks ago and this app projects my next one to start in two weeks. This morning I woke up to A LOT of blood in my underwear. Dark red blood. Some important factors are I am 17, I am not sexually active (I last had sex in November), i am on birth control and antidepressants, I work out a lot, I am a powerlifter and yesterday we had a big meet that I had been starving myself for a few days prior to make weight, and I have adopted a bad habit of binging and purging (which only started about a week and a half ago and I’ve purged myself four times total, including last night).

This freaked me out essentially. It was “Crime scene” levels which i only get the second or third days of my period. I also didn’t get that pre-period discharge yesterday or the days leading up. I wanted to consult the women on this app if this is just a surprise irregular period or something worse because my body is under a lot of stress emotionally and physically.