Hi there, lovely @nataliaalexandrea
At the moment, we don't have a precise way of being able to find threads we have posted in or created. However, you can utilise the 'Search Forum' function to type in your username and hopefully a few of your posts will pop up. Also, if you want, you can make use of this Member Suggestion Box to pop in the idea of being able to look back on your previous posts.
Sending tons of hugs your way!