Help me with my acct login

[Deleted user]

Ok I have a Trello acct that I have mainly signed into using google acct email at Lucy@growyourbase.co. This email will soon be deleted so I wanted to change my email to another gmail, but can't seem to do it. I get the email verification but when asked to enter my email password it says it's incorrect. I tried the email password of my google acct for Lucy@growyourbase.co, I tried the password for my new google email lucygyb@gmail.com then I thought maybe I should have a atlassian acct with the new email lucygyb@gmail so I created an attlassian acct with it but had to delete it as it said it's a duplicate. 

I thought maybe I should create an actual email atlassian acct with my lucy@growyourbase.co email instead of going through google but now that's a problem because I can't get to my old trello boards. What a mess!

What do I do? HELP