Extremely frustrating Mac WiFi problem, help!

Hi,
I'm having a really odd and frustrating WiFi problem on my Mac running high sierra. I didn't change anything and all of a sudden, it's saying no signal, and when I try to connect, it says try moving closer, I'm virtually on top of my router, I can't move any closer! The only thing that seems to help is to remove the network and then add it again which is a pain because the password is rather complicated and forgettable. I don't think the problem is my router, because I'm connected on my other devices. Any help would be appreciated, as I'm almost to the point of pulling my hair out, and I doubt I'd look very good bald, lol.