There are two ways to find content that you have posted or shared in the forums and gallery. Start by clicking on the ACTIVITY Tab.  You will see this at the  top left of any forum page.  Once clicked that will bring up all of your activity plus the activity on topics you are following or participating in.    You will see a few options appear in a navigation bar below  the Activity Tab.  Select CONTENT I STARTED to be shown a listing of all content you shared recently including new