^ That’s 9-10 hours there, you’re getting plenty of sleep. 
For most people (unless you have a condition like insomnia or something), your body will naturally take 7-9ish hours of sleep as long as you let it. It generally won’t take more.
It seems like you allowed your sleep schedule do what it wants, which tends toward staying awake late and sleeping in (I know, mine does the same). You just need to whip your sleeping schedule back into shape, and the fastest way to do so is to change your wake-up time. I’d say to set an alarm at a reasonable time, maybe 9am, and abide by it. Don’t nap for more than 15 mins at a time. You’ll feel like crap for a few days as your sleeping schedule adjusts, but then you can set your sleep schedule to occur at night. 