You can find your posts using the My Contributions section in your profile.
Find Your Posts from Your Profile
Follow these steps to locate your posts:
Go to your profile page.
Click My Contributions.
Select List of Contributions.
Browse or search the list to find your posts and replies.
What You Can See in My Contributions
The List of Contributions shows:
Your discussion posts
Your replies
Other content you have created
Use this list to quickly access, review, or edit your content.