Left arm a bit numb, now I have tingling in pinky up side of palm. Slight pain from my elbow up. I've had migraines with aura. Possibly heart attack?

Left arm nerve issue. Heart attack symptoms can cause left arm symptoms, but in a young patient without other issues would be very unusual. It also should not be migraine aura unless this has been part of your aura before. More likely you have peripheral nerve irritation that may be at the elbow (ulnar nerve) or possibly at the brachial plexus or cervical spine. See your doctor if it persists.