Maybe this will help answer some of your concerns. http://www.fibromyalgia-symptoms.org/fibromyalg...

I do, sometimes just from tying shoes, bending over, suddenly moving...I just blamed it on this extra weight I've put on!!!! But I was wondering if it could be the fibro. Other times, I can do my cardio and no problem. ?????

Yes definitely!! I am at the doctor right now doing a stress test (which monitors the heart while you walk on a treadmill). The cardiologist was very doubtful though that there is a hear problem. He said my shortness of breath is just my perception. I disagree. My osteopath said its because chest muscles are tight. He said work on posture, shoulders down, chest out, and do chest opening exercises. I also try to do rhythmic breathing (in for 4, out for 7- I learned this as a mindfulness technique) and just focus on making sure I am breathing enough as I walk

The lungs ate effected by muscle weakness. Before doing anything strenuous to you specific pain or weakness of the moment try taking a couple deep breaths. In for count of ten out for count of ten say for 3-5 breaths. Breath normal in between as to not get lightheaded. Then walk a bit brisk around the room for a moment to wake up those muscles. Helps me. Gentle hugs

Yup I do quite often! Randomly happens when doing something so small and if I get up too fast etc. Also when I'm really stressed out I find it gets worse and I have to stop what I'm doing and take a few deep breaths to get back on track otherwise I get dizzy