BrianKrebsTIL you can quickly find your own posts by including "from:me" in the search box and then a key word or phrase you're searching for. Yes, it took me this long to figure that out.
Laimis@briankrebs from:me trick depends on elastic search indexing being enabled and operational on the instance you are on. mstdn.social continuously stops updating those, so for me the most recent results are from feb 16th...