Iron lowest ever been (60) but ferritin is still good at 160. why is this? can this explain my symptoms of difficulty breathing and head pounding? no covid, heart problems, thyroid, etc?

Iron or ferritin levels have no effect on exercise tolerance or breathing difficulty -- only if low enough to be causing severe iron deficiency anemia, and iron level of 60 isn't nearly low enough to do it. This is something that needs in-person medical attention. If your symptoms are severe or sudden onset, get care immediately. Good luck.

It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Drink more water. Wish you good health!