Someone else will be along to give a better answer, but maybe this will get you started...
(1) just hover over, then click, the "Stephen S " in your posting here. That will bring up the last fifty postings for you. Unfortunately, seems you need to pick through each one to see if you initiated the thread or were just answering in another poster's thread.
(2) this poster in Lyme disease healingwell forum posted some search tips. Note, the user "sandyfeet" on 3/18/2020 was asking your same question, how to single out just posts started by you, yourself. No answer to her question, yet. https://www.healingwell.com/community/default.aspx?f=30&m=4184773
Using those tips, I went to google search line and entered:
"Stephen S " site:healingwell.com
and got back a lot of stuff, which I did not go through, but looks less maybe helpful than the prostate cancer forum search on your name I put in (1) above. Didn't see your post today, oddly, maybe because google itself needs some time to crawl the web and index things? Dunno.
Sorry, but maybe this will help a little for now.