[CLIENT] Can't log in with correct information, says password/username is invalid.

I was playing just last night after an extremely long break. Formerly a silver player from around season 2. Anyways, I end up falling asleep with my client open and my PC puts itself on sleep mode. Come back and I have to exit the client because i was disconnected for too long. I decide to get back on and try some normals maybe for some practice and upon trying to log in it keeps telling me username/password is incorrect.

Of course I go to change password so Riot Games can send me an email, and I never get the email. Try it twice. Nothing. So I go to change my password from my profile on the site. I enter my old password that i was trying to use to get on the client and wasn't working, and then i enter the new desired password. It works with success and sends me an email to verify with the numbers. Worked wonders. So, now with this new password I try to log in and it's still saying the same thing. I can log in fine on the support site and this site, i just can't get in on the client. I don't know why? I really wish I didn't have to submit a ticket and instead could just go to support live chat to get it resolved much quicker, but that hasn't been an option. So now I have to wait a day or two for a response to get this resolved which is upsetting because now i can't play.

I will also note that I can log into my other lesser account - just my main account im having a problem with. I don't know why. I really want to get this resolved ASAP. I can't play at all.

Am I the only one having this issue?