My League Password and Username Won't Work!

When I try and login with my main(this is my smurf although I'm only B2 on my main) it keeps on telling me my username name and password is invalid! Riot please help! I'm not sure if my account has been hacked or it's just bugged? I'm kind of freaking out because I spent a couple hundred dollars(don't judge, I know we all have spent a shit ton on League) and I lost all of my friends. So, am I the only one, or is it the same with other people? If anyone else is having the same problem, can we please let Riot know this is a major issue? Thanks!