I Have Muscle Problems To The Point They Are So

I have muscle problems to the point they are so tight I get dizzy and my chest feels tight, heart is fine, has all been checked. I don't get any relief, massage or physiotherapy only relieves tight muscles for about an hour or so, then all muscles in neck, back, everywhere tighten again.. causing the headaches, chest pain and dizziness. I take magnesium, drink plenty of fluids, nothing relieves it. I stretch every morning, walk, do yoga... no relief. I feel like my life has come to a stand still, always in constant pain ....Im only editing this because I was hoping for some suggestions, but I have to pay!!. OMG I have paid $$$$$ already for doctors, physio, massage, yoga.... this is crazy