I had my appointment today with the paramedic.
Its likely ,y Eustachian tube is blocked. He said to buy an Otovent and to use Beconase. If the Otovent hadn't worked in 2 weeks, phone for a phone consult and to get a referral to ENT.
The Otovent is a balloon and a piece of plastic with a ball shaped end. When I saw it, I thought I had to put the ball end in my nostril. Fortunately, it's not the case. I have to blow up the balloon with each notstril in turn, holding the other nostril closed. Then I have to swallow several times. I have to do this 3 times a day for the first week, and then more often for the second week.
It's easy enough, and less awful than it looked on the picture.
I wish I'd just gone to the pharmacist, as I'd be a week into this already by now.
The deafness is cvausing some issues.
On the plus side, my eardrum etc is OK, so that's good news.