Food Intolerance. Severe nerve pain.

I have food allergy. Most with fats. One day I had stomach full of oily chicken biriyani. And after reaching home I also had alcohol. That night I had severe diarrhea. Through out the night I had loose motions and that also with lot of force. I was feeling as if i will die. But I somehow survived. After that next morning I followed all loose motion diets ie basically liquid diets. After a week I got well. But when I resumed to work I had little weakness. So I thought it will go with time. But I also started having nerve pains, especially. I foot. And, I could notice nerves bulging up. Thinness of nerves started increasing and nerves were visible on skin. I went to doctor and doctor wrote a blood test. Blood test report came out normal and doctor told all the weakness and nerve pain is due to not eating proper diet. I showed to nerve specialist and he gave Gabapin NT. That medicine bought some relief to me for nerve pain. But now whenever I have loose motion I have severe nerve pain.