It's amazing how similar our experiences are - I had everything you've described (chest pains, dizziness, lightheadedness, etc.), and I know how awful it is! If you're at all congested from the cold, that also could be part of why you're feeling dizzy or could be making it worse. I have issues with my ears ringing when that happens, and the anxiety makes it much much worse.
I actually had about 6 weeks where I wasn't feeling anxious that were mostly symptom-free. Unfortunately, the past couple weeks have been stressful, and they all came back, but those 6 weeks definitely reminded me that anxiety really is the root of all these issues. Even now, my chest hurts and it gets scary, but I just remind myself that when I wasn't anxious, I was fine and I'm still fine now!