I have tingling in my left arm and im in veey pooe shape, is this an early sign of heart attack? I have trouble walking up stairs.

It could be. It's possible, so please seek medical care now. Minutes can make the difference!
The information you. Share is limited. However, shortness of breath on exertion or pain in the arm with appropriate other history and risk factors can be concerning for evindence of underlying heart disease. You should see your physician. Labs should be drawn to evaluate for risk factors. You should lose weight, avoid tobacco and likely have a stress test. Good luck.