What's the BlogSpot and / or domain URL?When we login to Blogger, and look at our dashboard, there's an equally essential detail involved here. That unique detail is called the "ProfileID".
If you are logged in to Blogger, go to your dashboard, and look at your profile. You'll find a tiny down arrow to the far right of your account name / picture, at the top of the screen. Click on the arrow, and you'll get a popup window, containing a button or link "Blogger profile" (possibly, "View profile"). Click on the button / link, as appropriate.
That will give you a display, with a mysterious URL. Here's the URL which used to apply to most of my blogs. If you click there, you will probably see the URL which I have now.
08069634565746003311Here's the URL which now applies to most of my blogs, and which now replaces my Blogger Profile.I now have.
What's your Blogger / Google / Google+ ProfileID? If you are seeing a problem accessing your dashboard, or finding a blog that you know is yours, the ProfileID - and possibly the entire URL - will be an essential clue.