Wifi, bluetooth and personal hotspot

Hello i hope i could get some help. I have kind of all round problem.

First, all of a sudden my iphone had greyed out wifi.

Second my bluetooth couldn't get turned off through the control centre which i tried to go through setting but it just loads and never gives you the option to turn it on or off.

Third, my personal hotspot is non-discoverable even though at first it shows it's off and when i turn it on it shows non-discoverable and cannot be turned on as how many times i tap it. If i try to turn it on through settings it does show it's turned on but it just auto closes the settings tab. The password just automatically changes per sec. ( i can see the default password but if i tap it, it would change to another one and when I go back, the default password originally changes to a new one and so on. it never stays one password)

i do not know if my phone is hacked or it is just a software and hardware problem but if it can be helped by just toggling some settings it would be much help to me. thank you