spotting, period ,or dying?

Ok so I've been bleeding out of my Lady parts for about a month now. Sometimes it's barley there and sometimes it's gooey and gross and it smells awful. And tbh I'm scared. It didn't happen until I got on the depo shot 2 months ago but before that I hadn't gotten my period in 2 1/2 months. The health department insisted I was fine tho and totally not pregnant. But now I'm just worried that I'm dying because it still has not stopped and it hurts at times and I would go to the doctor but ya see I'm 16 and I have very overbearing parents who go through all of my stuff and would beat the absolute crap out of me if they knew I was sexually active. Anyways tho if anyone can give me some input I would greatly appreciate it. Thank you.