help!!!!

since last monday the 18th to 22th i’ve been bleeding dark blood but sometimes it would be red red but that has stopped since friday it was the first time that has happen to me in my life. the same week it was happening i was ovulating... I finished my period on the 7th plus im not on birth control never have then i haven’t had sex in like a year 💀 but the feeling bloated hasn’t gone away and im so over... my stomach feels weird what can this mean ??

i need to go see a doctor soon 😭 and im suppose to start my period in like 11 days since it says on the app i’ve been on this app for a while now and i always get my period when it says on here