Feeling sick after laser hair removal?

Hello, I'm a 27F who has tried Alexandrite laser sessions 3 times in row. After the session (total body first 2 appointments and 3rd only half lower body with Candela Gentlemax Pro laser) in 4-5 hours or even a day, I end up feeling sick with headaches, chills that last over an hour and overall fatigue and loss of appetite. Should I continue the remaining sessions? Is there an analysis or test I could do in order to find out why I am experiencing these awful side effects? Thank you!