Please help. extreme itch and rashes, scabies??

Age:18 australian female Hi! I've been struggling with extreme rashes and itch for months and am hoping someone recognises the symptoms and can help. Have been to several doctors with no success. For context, my friend who came from england for exchange had rampant bites all over her body which to me looked like scabies. Her doctor also said it wasn't but the treatments solved her itch. Then my symptoms started, which i've explained below and included images of each stage. 1. hives under armpits and on neck/chest 2. bites all over body, mostly in common scabies areas. I was tested for scabies using skin biopsy, came back negative. Have done two rounds of treatment incase and bites have gone away, rashes haven't. HOWEVER, i just looked closer between my fingers to find what i believe are definite scabies burrows. in cuded images below. 3. after the bites went away, hives persisted and a new rash that looks like little red dots is all over my body, i am still EXTREMELY itchy and am debilitated by it. can't go in the sun, excercise or get hot as it just gets worse. struggling to sleep. i have tried everything, pine tarsol, oatmeal and bicarb soda baths. Steroid creams and tablets for the recommended time. no new products that could be causing a reaction. we had ruled out scabies but am now thinking it must be that but what would explain the rashes? also considered histamine intolerance and MCAS but they wouldn't explain the bites??? PLEASE HELP!! I'm desperate