The tightness in the chest sounds like how I felt. Try to find a chiropractor who knows how to adjust hiatal hernias. You may be able to relieve the symptoms. I went the natropathic physician route. It has been two years and I feel great. I still need my stomach pulled down every now and then but quality of life is much improved. I cannot speak to how the asthma relates, but I hope this gives you another option to try. Good Luck.