Help Brown Blood on Depo


Hello everyone! I’ve been on depo since about April & since I haven’t had a period but on the 30th f August I began spotting then when I’m assuming was my period came. Last night after using the bathroom I wiped & the “blood” was brown. Is this normal? I wanna insert pictures but that might be a little weird lol I googled and of course google has the worst news lol according to google I either have an std or I’m pregnant neither is true because I haven’t had sex & I get tested 😂 so basically I’m confused and wanna know if anyone else on depo or any other birth control have this problem? Is it just old blood? Like whattt?! I don’t wanna die yet lol