I have left shoulder tightness, little pain on and off. stomach feels full, pain, stomach rumbling non stop, headache, left chest tightness, diarrhea or constipation all the time. what should i do? i am also on blood thinners due to had blood clots?

Have a physician check into the left chest&shoulder tightness. I doubt a relationship with your history of blood clots. Muscular tension may be the cause. Your stomach symptoms are nonspecific but could be related to irritable bowel syndrome. Stress management therapy would be helpful if no other pathology is found after your medical assessment.