Muscle knots, muscle pulled, muscle pain

I have pulled my muscle under my ribs n stomach while doing exercises I guess,I heard a  noice ,but its not spine related says my physiotherapist, Im having digestion issues,shortness of breath, I hav a bump on my stomach,feels tight on my left side of my body,tightness even in my chest,my gastroenterologist didn't find any issues in endoscopy n ultrasound,even I consulted cardiologist n neurologist,they didn't find any issues ,ECG ,echo is normal, I have heart palpitations,bloating,gas,sometimes chest pain..can't understand wat problem I have ,every test came normal Isit related to muscle knots ? Doing regular exercises n streching...but still my muscles under my ribs,stomach,cheat feels hard putting pressure on my stomach, chest,affecting breathing ..kindly help..thank u