I tried to to manully turn it off and leave and did that 2 times because it kept turning itself on?? Only on the third try did I actually manage to turn it off and when it cooled down i turned it back on.

Right now it seems like everything is working but it literally died in my hand like 15-20 times yesterday and today for no reason, the battery isnt empty, i was barely using it and i didnt leave it out on the sun or anything, it was just on the table and when i pick it up for eg to answer a message it shut off

Does anyone know what to do? I already did everything google suggested, i toggled off everything unnecessary, its working on a basic mode. Im really worried right now cause i have a trip in 2 days and i need my phone with cause thats where all my stuff is.