I struggled with what to do. The way I saw it, I had 3 options: make my blog private (which I don't like), stop blogging altogether, or make a new blog and NOT link it on my old one like I had with my second one. So, as annoying as it is, I just went with creating a new blog.
I tried to import all of my old posts into this blog, and I got most of them, but the comments are weird and if you try to leave a comment on any old posts, you get a weird error message. Really, I'm not concerned about that and I have no idea how to fix it, so I'm just going to go with it!