Hello I have been having anxiety issues and having shortness of breath. I dont have any cough cold or fever When I inhale.. i feel im inhaling half.. And.. my chest feels a little tight. Area below my sternum is stiff And my sternum makes a cracking sound when i move at one place. Sometimes when i inhale...i have to make a lot of effort and pull it.. my stomach goes out.. And chest makes a cracking sound What might be the issue. I dont have any major medical issue as such. Please suggest as this is highly uncommon