Identifying Little Black Biting Bugs?

I've suffered in all aspects- mostly now mentally I suppose, for over a year from bug bites that hurt, itch, more than anything I've ever felt. I've also been "stung, bitten," to extremes where I sweat in pain, and scream! They are teeny, and burrow in my skin. They look black mostly, and the sores eventually become huge, thick ugly scabs- that is if I don't dig them out due to pain or uncontrollable itching.

I've tried everything! I've been to 3 dermatologists. The one I'm staying with, tried pills to work internally. No such luck! I use 1 pill for night itching, as nights seem worse, as do outdoor bites. I am afraid to go out, but I force myself. I hate looking at my once clear skin. So showers are very stressful. I'm afraid of them honestly. I close my eyes. I actually met another woman who had a mild case on the back of her legs. She found green tea ointments, Cetaphil hand/body soap, Cetaphil lotion, and green tea leave in moisturizer-meant for hair-made by Green Tree, all help. I believe "they" despise green tea wipes, gels, anything, and many times all the black things eventually come out of sores. I even use green tea shampoo & conditioner. I keep my long hair pulled up mostly.

It's a full-time, ridiculously stressful job, putting on 10 ointments, over counter non-drowsy allergy pills, washing and conditioning my hair with Green Tea hair products, lotions, changing my clothes 2-3 times daily, always after a shower! I used to bag all clothes from the dryer, but getting dressed took an hour, and truly I don't notice a difference. I've been told - no dryer sheets or liquid softener. I use Lysol liquid made to add to laundry soap. I do have a very very low immune system, and think my hours of gardening when my dad was dying, is where I may have contracted "them" originally. I was often on my bare knees, no gloves, etc. for years. Now I fear the bites, stings, even venturing outdoors.

My dermatologist is going to do a biopsy if "counseling" doesn't help. At least he's not cruel, and he does care. How much of my story, wondering, sounds like "U"- anyone? Has anyone been successful totally or on their way to a cure? This has destroyed my entire self - stolen my identity, depressed me to very low places, and then life's problems, blessings, are super hard to be present! Thank you to anyone, and I surely understand this "disease" as scary, awful, for all.