Always congested and causing dizzyness?

I have congestion every single day, some days it's minor some days it's really bad, some days it's in the middle. I have severe allergies and I've always had bad conestion and sinus problems.. I actually do this weird thing, it started when I was like 10, I do this thing with my jaw to pop my ear and I feel relief of pressure from my ears. When I do it, it even seems like I can hear better and sometimes I'll do it a lot which makes it look like I have tourettes or something, but I can't stop doing it cause my ears start to build up pressure if I don't. Anyway sometimes I have to pop my jaw a million times to clear my ears, and sometimes it doesn't clear all the way and gets stuck so i'll keep doing it and doing it. Well recently when i pop my jaw and it gets stuck, I get dizzy to the point where everything is spinning and I feel like I'm going to p out. I take zyrtec, sudafed, nasreal, I've been to a million ear,nose, and throat specialist and the doctors keep saying there's nothing wrong with me. I'm tired of being congested every single day and this stupid pressurized crap in my ears is so uncomfortable and I've been doing it for 9 freakin' years now. Please tell me if there is someone who has the same problem or if you know what the hell is wrong with me. This can't be normal.