Unable to connect on main account.

So I recently took a break off Nostalrius for about 1-2 months from my main account and finally decided to come back. I downloaded the client and go to login with the same credentials but every time I'm getting Unable to Connect so then I go and create a second account to see if it was on my end. Then when I try to sign in on the new account it works completely fine. Not sure if this post is in the right place but I'm just a little confused. I'm also 99.99% sure that the credentials I'm signing in with on my first account are correct.