Where is this email going that I cannot access,even though it pops up that I have it?

Im trying to cancel a CTA Chgo Plus card so I went to my account on their website. I forgot my pword, so went thru the necessary steps to get it. The message generates that "your pword has been sent to my yahoo email address. I then see the "pop up" message from transitchicago which states I have an email from them, but when I go into my mailbox, it's not there, it isn't in the trash folder or spam folder. Can somebody tell me where it could be or why I can't access or open this particular email? Thanks much!!