WHERE DO I FIND THIS POST?
What?
whatever post your trying to find just scroll down until you find it
Which post are you trying to find? Here’s a tip: if you want to keep track of a post, you can bookmark it. This way, you don’t have to keep scrolling down until you find it.
If you give us the title of the thread, we’d be happy to find the link to it for you, @Laynepool 
Otherwise, indeed, as @WonderFlash93 mentioned, we have a bookmark feature that you can use to keep track of threads.
To use it, just click the vertical ellipsis symbol to the upper right of the thread to see the drop down option. Once you do that, you should be able to see your bookmarked threads on your Community Home Page.