Someone else mentioned they weren't able to start a new 'thread' and I think it was because they were trying to start one while in another person's 'thread'.
I think you have to exit out of this current thread and you'll see at the top left of the screen the option to start a new thread.
You're doing good at making a 'post', like you did here, but I'm thinking you want to start a new thread? If so, like Koala mentioned, scroll thru the main menu and find the forum you'd like to start a thread in. Example, if it's a particular health concern then scroll a ways down the main menu and you'll find the health issues listed in alphabetic order...and there are many other support forums listed in main menu.
Have I completely confused you?

It's easy once you get the hang of it. I learned my way around by popping in and out of different forums and the moderators are a huge help also.
Rae