Talk to Ent Specialist on Distorted Sense Of Smell, Nasal Congestion

I suffered from fever, cold, bad cough etc. back in January, due to which I lost my sense of smell and taste then. I partially got my taste back after some time (still not like it was before) but now experiencing weird sense of smell (parosmia), and dealing with a bad taste from each food with a strong foul smell. It resembles like something rotten. I also feel some smell in my throat. How to treat it?