I felt breathless and sinus. tachy ecg abnormal septal motion on echo scoliosis on x-ray im scared to have brain mri in case of another abnorm. causes?

Too many tests?: It's well-known that abnormal test results often lead to anxiety. That is one hazard of excessive testing. It's expensive, & often turns up unimportant abnormalities that lead to worry. No one has a perfect body. Sinus tachycardia just means body is stressed, physiologically or psychologically. Breathlessness can be psychologic too. Talk to Dr about how much testing is truly needed vs relaxation.