How might you feel when your sympathetic nervous system is stimulated?

I'd feel nervous, anxiety would build up and trigger the body to go into panic mode

It accelerated your heart rate so you feel as if you're in a rush / need to rush, you'll feel tense, your pupils dilate to let more light in to see better in darkness, your digestion rate decreases, more blood flows to your muscles so you can fight or take flight (run away)