...just lost my other reply... poppsy1 sorry not sure about your scalp issue but when growing up, poor family, we used bar of plain soap, no bottled shampoo , and not saying this might work, but as a rinse (no cream rinse in those days) and no shower just a bathtub and jug: Mum used to put, well I am guessing, about a Tablespoon vinegar (it was malt vinegar) in the jug , and added probably about 3 cups warm water and ran through our hair after rinsing off the soap: I think she then rinsed again with plain warm water. (Shes not around to ask her)...but we had shiny clean hair . There was no smell of vinegar on our hair ... no "chemicals" but it sort of made sure all the soap was out and I think vinegar is harmless and also beneficial.. not too strong a mix.
Sorry not sure if this would be an idea for you, unless have cuts on scalp or sores.... is it worth a try?
Odd how now, as an older person, I have memories of the simpler times. Only meds we had were vaseline and Vicks I think! Anyway, thought I would mention it. My husband had been helping me a lot over the past few years and had to go out of town for heart surgery for 3 weeks and I had to cope on my own and look after house and dog. and snow removal..... and being alone certainly can wear you out, more so if ill... I am sorry to hear your husband died... that is enough in itself to cope with let alone pain and suffering... hope you get not only some responses to your calls to day but some help! J.