Difficulty breathing; Short of breath; Someone knowledgeable HELP!!!?

I know there's a lot to read below, but anyone who might can help, PLEASE READ it and HELP ME if you can!

For the past 3 days, I have had severe difficulty breathing, I've had this problem since elementary school when I 1st went to the doc and was not diagnosed w/ asthma or given any other explanation. It's difficult to explain, but I'll do my best: I'm sitting here breathing like we all do, suddenly I feel as if I can't breathe in a deep enough breath, I sometimes have to move my body around (tilt my head, sit up straighter, etc) to catch it and breathe in deep enough. It's as if the normal amount of air that I breathe in while regularly breathing is not enough to fill my lungs and then I suddenly feel that urge to take a deep breath. This is something I've been dealing with since elementary school. The severity over the years has gone up & down, at times not bothering me for up to 24 hours, then at other times bothering me throughout the day for days at a time. As I get older, I feel like it's getting slightly more difficult to catch those breaths. Over the years, I've been given different inhalers, all of them for some form of asthma (I assume, I don't even know) but I've not been given any diagnosis. Altho the inhalers do open up something in me, I don't feel they're opening up what ever it is that I need cleared for better breathing. "My Breathing Problem" is what I diagnosed it & been calling it for years. There's no pain typically associated with it, but when there is pain it's deep in my shoulder blades.

These last 3 days I have exhausted myself trying to breathe (literally). I don't know what's happened. Catching a deep breath will typically last for a while before I have to do it again. I'm so used to it that if it's not acting up I don't really even notice when I do it.... For 3 days the shortness of breath feelings have literally been hitting me back-to-back-to-back, sometimes as little as just a minute apart. Small things like rinsing a dish in the sink or walking to the bathroom have made me struggle to catch my breath. The past 3 days have been the worst it's ever acted up. I feel like I've been working my butt off just to breathe. I hope when I wake tomorrow that it's back to normal (what my normal is) because I don't know how much more I can take.

I don't have insurance and try to stay out of doc offices unless I HAVE to go. Anyone who's knowledgeable about this breathing issue or anyone at all who can help me, PLEASE HELP point me in the right direction of figuring out what it is and what I can do about it besides get expensive inhalers that do not touch the area that my problem is in.

THANK YOU for taking time to read this and possibly helping me.