Middle ear effusion. What more can i do?

Took a flight a month ago. And a rhythmic wind like sound started in my left ear. ENT diagnosis middle ear effusion with mild hearing loss (18 dcb) after doing pure tone auditory tests and tympanometry. Prescribed Mucolite and kinotozyme for two weeks. I also had some nasal congestion for the last 3 months after Covid. The doc said that made the congestion worse after I took the flight.. The sound started reducing after 3 weeks and it would start and stop but then again my nasal congestion got worse and so the sound started coming Back. Also, When I tug at my left ear ( with tinnitus) I hear popping or a joint cracking which causes some pain.. not all the time.. sometimes.. Doing steam inhalation everyday. What more can I do? It’s been a month since I took the flight.