iPhone Can't Connect to Internet

So, my phone was randomly disconnecting and reconnecting me to my internet. So I looked for help and did the "Forget this network" option. Then I tried to enter the password and it says unable to connect.
Then I reset my wifi settings, same problem occured.

I restarted my phone, same problem.

Plugged my phone into my PC and updated it to the latest IOS, same problem occurs.

I don't know what else to do, my wifi works fine but my phone won't connect to it.

Also:
After entering my wifi password and attempting to connect, it connects for acouple of seconds and then says Unable to connect.