Advice for laser induced hair growth?

Hi all,
I am 37, male caucasian. I have very light colored white skin with green/hazel eyes and dark brown hair. I burn easily, but if I take it slow I can get pretty dark tanned in a few weeks. Last month I went to my dermatologist to remove a bad mole and on my way out I saw this brochure on Lightsheer Duet. I showed them my back and the technician came in and said she could do it right then and there in 10 mins. I said Ok what the heck, and went with it.

Now its been one month exactly -I am really uncomfortable because I read about laser induced growth side effect. I have been looking at my shoulders and my back trying to see if something has changed. I shed a lot for 3 weeks and in the past week, light brown hair started to come out. Invisible whitish blonde hair that co existed with the stronger ones have also grew slightly but nothing alarming yet. I am trying to see if the natural invisible body hair was stimulated but I can’t really say for sure. How long should I wait to see if I actually had an induced stimulation side effect?

I had sparse dark hair on top of my shoulders and back . If I counted them, there couldn’t have been more than one hundred dark hair on my shoulders and back in total. The rest was microscopic invisible hair. Needless to say this was my first and last laser on my shoulders and back.

P.S. On another note I am thinking of maybe going one time to get my chest and abs done. My hair there is very coarse and thick like underarms. However I dont want to have bald chest, or patchy chest at all. I just want to make them a little finer. I would also appreciate your advice on the chest as well as the induced growth issue.
thank you for reading!