Hello, I've had my phone for exactly a year now and just 2 days ago it started overheating without being used and the battery was draining extremely quickly. I closed all the apps, would restart the phone and it kept doing it. It warms up my leg through the pocket and it's really starting to worry me.
It's never a good time to go through that with your phone. Can you send me a private message using this link here? Provide the following information.
Sorry to hear about your screen. You can take it to your local Ubreakifix store or Samsung experience store and they can take a look and repair it for you. I hope this helps!
It maybe an issue with battery optimization. You can check to see which apps are causing issues with battery draining, app crashes, or malware/viruses here.
Device maintenance > App issue report
I hope this helps!