What's wrong with my iPhone? - 3

Ok so yesterday my iPhone has been acting really really weird. I'm not getting any notifications and I see that I do when I go on my apps, and YouTube keeps logging me out when I already log in, and I've tried to restart my iPhone multiple times but nothing is working. Why is my iPhone doing this?

Maybe it is broken?

Back everything up and do a factory reset.

Try restoring the software through iTunes.