Caused by middle ear fluid?

I’ve been dealing with this for weeks now! It’s driving me insane. Went to my GP and she said I have fluid in both eardrums and it should go away but can take up to 3 months?! Anyone else had it due to trapped fluid? Anything that helped give you relief? I’m hardly sleeping as all I can hear at night is my heartbeat in my left ear constantly or when I’m doing cardio or bending down.