Find your posts on the entire CN
If you want to find ALL of the posts you have created on CN, you need to go to your CN Home page (https://www.thecn.com/user), use the post filters (underneath the community tags section and above the post feed). There, select All My Content. You will then see posts you have created on the entire CN.
You can also use the My Posts, My Polls, or My Events filter to find your posts of a specific type.
Find your posts in a specific course/Network
If you want to find all of your posts in a specific course or Network, you want to go to the course Roster or Network Members page from the left menu, 1. find your data entry, and 2. click the post number link.
Note, if you click the reflection number link, you will be able to filter all of your comments in the course/Network.