I have had a worn disc around T12 and have done for past few years. Pain when flares up usually manifest in my left upper abdomen although when you touch the area in my back that hurts too! I usually keep pretty fit but have over the last few months had several colds and am having problems exercising. I started getting chest pain right under my left breast on exercise and breathlessness. Cardiology completely checked out and okay. However pain in chest now goes through from front to back and around my left side. Worse on exercise. Not always aware of it but it can keep me awake at night. Went for a run a week ago and pain intense and lasted at least a day and easily set off. Getting more pain at night now. Noticed a little bit of pain coming on my upper right abdomen. Breathless on going up hill. Is there any way this could be caused by my worn disc?