I tried to start a discussion - got a "flooding" message - discussion isn't up, as far as I can tell

I'm new to the community. I successfully started a discussion a few weeks ago, but when I tried again today, I got a "flooding" message and my discussion was never posted. How can I get my discussion posted? Thanks in advance for any help!

The play by play: I was typing today's new discussion and adding screenshots when the site seemed to lock up. (I could still see the message section of the screen, but the rest was greyed out.) Not finding a way to make the screen active, I went out of the site and came back in. 

Not being able to find my draft, I retyped the discussion, added screenshots, and hit "Post." I received a message that I had saved content. I tried to retrieve the saved content. Nothing seemed to happen. I then tried to discard the saved content. I was still getting error messages that I needed to fix things that were highlighted but didn't see anything highlighted.

As I was working with it, I eventually got a "flooding" message saying I had posted more than twice in 300 seconds. Argh.