The phone’s back camera wasn’t working when i used the normal camera app but it was working fine on snapchat. I rebooted my phone and turned on my camera and this is the pop up i got and it kinda overheated just after restarting though the camera app is working now. What should i do? The phone has got no other damage luckily, thanks to the case
The camera isn't damaged, something just moved inside the camera module due to the fall. Take it to a trusted technician or an Apple store for a revision, maybe it's just disassembling and assembling the camera again.
I do that kind of things by myself, but I suggest you to not try it unless you know what you're doing
Or change the camera if you want to take no risks, your phone your choice