Stress/Anxiety 24/7

I feel as though I'm consumed by stress and/or anxiety 24/7. My stomach is in tight knots and my head rushes a million miles per hour like a race track. Is it normal? I'm not aware if it is. I've asked others and questioned myself. It always results to the same. "See a therapist", "Talk to someone", "Fix yourself". I am ALWAYS anxious or stressed. In this situation. I have done all these but what do I do to change that feeling, it's horrible and debilitating to experience. I don't know how to explain it to people.