here are the things I have done, I might have forgotten some (maybe)
reset router twice
reset pram
reset smc
changed location in the Network tab
put "wifi" on top of the list in the network tab with the "set order service"
removed my wifi from the preferred tab and re added it many times
renew dhcp lease
turned of wifi and turned it back on
resetarted computer and router
delete the system preferences folder or something like that I forget
There is probably more but I can't remember right now.
Also when I try to connect to my wifi I'll type in the right password and I'll get a "connection timout" or something like that, I have also tried typing in the wrong password and still get the timout error. If I try adding in the wifi manually in the "preferred networks" tab in the "networks" tab, it wont show the timout but the wifi icon will do the search animation where the bars keep going up and down but I won't connect to anything. Also after I do that I try to connect by pressing the wifi icon on the too right, it will pop up with an option to run diagnostics.( I have tried this as well) it also says in that same pop up that I should move closer to my router but that's not the case because it isnt close, bu. It's not far either.