I'll be away for three days, but as soon as I'm back I'll get back to you. In the meantime, I hope RG from Humaworm is reading your posts and has some more advice for you.
I also hope you'll get the Humaworm stuff soon, so you can start battling whatever critters they are that make your life hell right now.
The pics you posted seem to be a clear indication that you're carrying some unwanted guests. But I'm not an expert, so my opinion is not of much value.
With some luck, RG will be able to identify it.
I'll be back soon, then I'm going to answer your extensive post. Thanks in the meantime to going to so much trouble.