It's normal. It's just your body reacting to the toxins mobilizing and leaving your body. Nothing to do with your character. So you'll be a superstar!

I admire you for hiring a trainer. I have paid for so many gym memberships that if I had the money, I probably could retire.:( But that is in the past.
I am not brave enought to hire one even though my man partner has offered to pay for one. You have given me some encouragement. :):hug:

In regards to feeling ill during your workout, I agree with what other folks have said about eating a little bit and drinking some fluids before your workout. If you have been sedentary for awhile, it's your body's way to becoming accustomed to moving more.:)