12 day period after getting of the deposhot help!!!

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I’ve been on the deposhot for two years it was a great birth control but my doctor said that if I continued to take it any longer I could become infertile so I haven’t took birth control (the deposhot) since March and I just got my first period in three years (because taking the deposhot I didn’t have a period) 12 days ago

I’ve been on my period for 12 days can someone please tell me what’s going on? When it will stop? TMI BELOW

Okay so like at the beginning of this period I’m on the blood was really black and like “stringy” I guess and now it’s like super duper red so if that helps any idk