Take lots and lots of painkillers to ease the pain. I get lots of ear infections so I sympathise with you, I'm coincidentally just coming to the end of an Amoxicillin course.
Although, it doesn't sound like your ear has perforated. Have you had a perforated ear drum before to compare it?
It happened to me when I went on a short-break to Aberdeen, I had to fly back with a bad cold/mild ear infection. The pain was excruciating and unbearable, the pressure in my ear drums was so intense I was nearly sick. Then suddenly the loudest popping noise and that was it, the end of all pain.
My ear was running with watery wax and blood, I was almost completely deaf for a few days, however there was no pain at all, and certainly no feeling of pressure. Because perforating your ear drum would mean it has a hole in it, there should be no feeling of pressure behind it, as it can pass freely through the drum
Youtube ways of unblocking infected ears- there's some videos with tips/exercises, none of it worked for me but there are comments on the videos saying it did for them. Everyone works different!
Hoping it gets sorted soon for you OP I know how unbearable they can be, just take lots of Ibuprofen to help and apply a heat pad too, not just to the ear but to the neck and jaw area too