B.S.
K.:
I am SO sorry you feel abandoned by us (the rest of the Mamasource community). On behalf of all of us, I apologize - you are never alone.
That said, I know I personally didn't respond to your first request because I didn't know what else to tell you. You are in constant contact with your doctor, which would have been my primary suggestion. You know your body best... keep pushing until you feel better.
Again, that said, I reread your post. You're not losing your mind. There are times when I feel like I just cannot get enough air in. I don't have asthma, I don't have breathing problems, my allergies are minimal at best and I'm NOT pregnant. But there's times when I feel like I just can't get enough air into my lungs. I'll take a deep breath, somewhere between the start of a big sigh and a deep yawn, and yet I still feel like I need to take another right after, like I just didn't get enough air in the first time.
So here's what I do when it happens. It's not a solution, but maybe it will help until the problem is uncovered. When you can't get in enough air, I find myself sitting up straight, I'll literally place my hands on the arms of the chairs, elbows up (like a desk chair as if to open my lungs more). I'll take a deep breath through my mouth and hold it, swallowing once in the middle before I let it out slowly. It's best to do sitting down because you might get light headed but it's a temporary fix for me. Mind you, when I feel this way, I find myself doing this multiple times a day but the feeling eventually subsides.
Again, keep in touch with your doctor. I wish you the best.
B.