Is there any way to retrieve your Tumblr email and password?

I have two tumblrs so for my first one I used my main email address. I created another one, but I don't think you can use the same email for two accounts, so I THINK I used my gmail email address for the second one, but when I went to type it in for password recovery it said that there was no such email in their database. I have the URL...I just don't remember what email I used for the second account because you can't use the same email twice, right? Pleaseeeee please please help. By the way...I already had them send me a new password using my main email address and it sent me back to my first account...so I couldn't have used the same email for both accounts, right?