Can you explain what happened when you previewed your post? You should be able to scroll down from the preview back to the text editor to continue writing. If your post includes an attachment, it may take a while for the Preview page, or the text editor content, to appear.
If a Preview fails, you should be able to click the Back button in your browser and recover your text. This may depend on which browser you are using. If your internet connection cannot be relied on when you Preview or Send, it is a good idea to Select All (CTRL-A) and then Copy (CTRL-C) before doing so, which can then be pasted back (CTRL-V) if necessary. Alternatively for a long or complex post, it may be better to compose it in some other editor, such as Windows Notepad, and then copy/paste into your post.
I would be interested to see your photo -- you can find my email address by clicking on my name on the left, and then my Profile. I won't copy it anywhere else.
Hello Martin -- When the Preview failed I think I panicked and hit the Back button straightaway and scrolled up and down still in panic mode. Maybe I should have waited a bit before acting.