As per your complaints In my opinion you are suffering from GERD(Gastroesopheagal disorder). Because after having any food you feel vomit.Some investigations are required.
And as you have mentioned about pain in lower limbs.you should go for Tests of
Vitamin B12 and Vitamin D3.Deficiency if these vitamins usually causes such type of pain.
Next Steps
your problem is surely treatable with Ayurvedic Medicines.So visit at my clinic or can take online consultation.
Health Tips
By the time avoid oily and spicy food.Don't overeat and hv short meals at short intervals.