There’s no point us suggesting things you already tried, and we can’t help troubleshoot if you don’t explain what you did, and what happened when you did, including what you felt and sensesd.
You’ve been on this site a while, so I’m trying to treat you less like a complete newbie and work with what you’ve done so far. Can do that if you don’t want to explain it.
Otherwise, we have a bunch of tutorials you can try to get rid of parasites:. Try the LBRP.
