What Causes Partial Hearing Loss And Ear Popping Since A Head Cold?

i find it difficult to hear with my left ear . two months ago i got a head cold and my left ear has been giving me
hearing problems since . i have been to my GP and got my ears checked for wax .the problem is i seem to be talking
out through my left ear that type of feeling . it seems to get worse when i am talking in a group of people .it is very
distressing .please can you help