Hi, the lower abdominal pain in the back suggests, Bone problems like degenerative process of discs and facets
(Which is age related), herniated disc, spinal stenosis, osteoporotic compression fracture etc. which is in
97% of cases. Other possibilities are prostitis, nephrolithiasis, pyelonephritis etc. I suggest you to consult
an orthopedician for detailed evaluation. Dizziness may be due to your antihypertensive and dry mouth is due
to Amitriptyline. You need to consult physician for evaluation of sleep disturbance. Take care and regards.