Do it yourself.
I had and the same - the next nurse appointment was 2 months away.
It was driving me nuts.
So I got a syringe and used warm tap water in the evenings after treating with oil in the morning.
Gently at first, then I used short bursts to clear it up.
Worked a treat.
By the time I saw the nurse she said there was nothing further to do.
However, do not do it if you have perforated eardrums.
z