Your symptoms do need to be addressed.
The pinched nerves (due to bone spurs/lumbar and cervical spondylosis and degenerated disc disease) can cause wet sensation in the arm and leg which comes and go.
The burning feeling around nipple, nausea, pain in middle and upper abdomen need to be looked for following;
1) Hiatal hernia
2) Acid reflux (GERD; gastroesophageal reflux disease)
3) Peptic ulcer
You can start following treatment;
1) antacids; Maalox
2) acid blocker; Prilosec
3) loosing weight, if overweight.
4) avoiding spicy food, alcohol, citrus fruits and juices, chocolate, and tomato based products
5) avoiding large meals. Eat 5 small meals in a day.
6) wait three hours after the meal before you sleep.
7) elevate head end of the be by 8 inches.
You would need following investigations, if not done;
1) Upper gastrointestinal endoscopy (camera exam)
2) Barium swallow and barium meal
It seems that you have neuropathy, which is giving you leg ache, for which you are taking Neurontin. Supplements and alternative integrative therapy protocols for neuropathy are;
1) Evening primrose oil
3) Alpha-lipoic acid
4) Benfotiamine (Milgamma), 100 mg, is a lipid-soluble vitamin B1 analogue.
5) Vitamin E
Neuropathy also can explain your paresthesia / wet sensation. This is diagnosed by;
1) Nerve conduction velocity study
2) Vitamin B12 estimation
3) Skin biopsy.
It is priivlege assisting you.