I M 40 Years Old . I Feel That Something

I m 40 years old . I feel that something in my throat (liquid type). When i try to clear my throat it become dry and not comes anything and feeling suffocating. I consult many doctors but result is zero. The report of endoscopy, THS test, blood test, sinus are normal. The the problem is still at is it. At present i m taking some medicine like Pan D, Mucaine Orange gel, Levoflex 500mg. Give some advice what I do ....