Post hidden in gallery mode

I’m writing posts on wordpress for a school assignment, the prof made us “contributors” which means we can’t edit our own posts. I accidentally set my post to “gallery” type or whatever it’s called, and now at the end of my post there’s a tag called “more galleries”. The problem is my post is hidden, unlike normal posts, and all the formatting is gone. Only the first few sentences of my post is visible on the blog, with a “continue reading” link (which of course most people won’t use). Why in the world does wordpress hide my post and lose my text formatting? It wasn’t even like this in the preview. Is there any way to make it display like a normal post? Everyone else’s post is displayed full-length, then in the middle comes the first few sentences of my post that is almost impossible to notice. =/