Anxiety cough

Hi everyone really hoping someone can help me here

I have had anxiety for about 3 years now ever since lock down i have gained a nagging cough its very dry and does not produce any phlem except some mornings, after worrying about this cough I called my GP who when through my symptoms over the phone and explained it sounds like an anxiety cough. the cough did not leave but i felt much better the last week ive now gained an achy chest and even worse cough. ive been tested for covid 19 numerous times which are negative. after help from doctor google I have made myself beleive this could be lung cancer. is the persistant cough and tight achey chest a sign of anxiety? could i be coughing subconsiously its caused my chest to ache? please help