If i post a question or a comment, how do i find it again cos im scrolling an searching for them when i log bk in? Is ther not some sort of an alert or notification when i log in to tell me? Please help!

If you're on a PC, click on Quick Links then Threads I've Posted In.
If you're on a mobile and have Subscriptions turned on tap on User CP then Subscriptions.

Im on my iphone, thanks i'll try it now.

How do i turn subscriptions on?

Don't think you can on mobile version ... could be wrong though.