Sorry you are having a hard time. It sounds like hyperventilation to me. That can cause basically all of your symptoms, and it is very common in anxiety. It is also common for the person to have no clue that they are hyperventilating. I do it all the time. It doesn't have to be rapid and weird, it can just start as shallow (chest breathing), which will make you feel short of breath, and that will cause you to take too many breaths, deeper and deeper, and yawning, followed by yawns that never feel satisfied, etc, and if you start to panic from it, it can get even worse. This causes too much oxygen in the body and not enough carbon dioxide, which results in tingling and numbness, feeling faint, and yes sometimes people can pass out from it, but rarely, and even if that happens, it is not dangerous. It just feels scary dangerous.
You have to try and calm down and build up your CO2 levels. You do this by forcing yourself to take a slow breath in over five seconds, hold the breath for another five, and slowly exhale for about seven seconds. Keep doing this, slowly, until you start to feel a bit better.
Unfortunately, like all things with anxiety, the more you focus on something, the worse it gets, and that is the case with breathing. If you keep paying attention to it, hyperventilation and the like happen easily, and it will make you even more focused on it due to fear.