What Could Numbness In Body With Dizziness Suggest?

Hello! I've been feeling a bit weird lately. Sometimes my whole body feels numb, and i feel very faint. The situation gets worse when I try to breathe deeply. This symptoms usually happens whenever I am stressed out. Do I have an illness? I've read about stroke and heart attack symptoms, and am afraid that I'm experiencing those. Is it possible for you to verify what's happening to me?