Age
distressful life is obvious from your post here and inevitable with sick son. I would suggest trying make up sleep in day hours when son is sleeping and scheduling your domestic chores accordingly. With stress and tension, Back pain, BP fluctuations are possible. Take mild pain meds like alive and apply pain/muscle relaxant gels locally after hot fomentation and sleep on soft but firm mattress to keep shoulder and spine straight. Consult a doctor for mild tranquilizers, muscle relaxant tabs and multivitamins best wishes