I would defer to their guidance then. Did they indicate to you when you needed to do follow-up labs?
how do you feel is the important question. Lab are good as a guide. Were you given the option to increase after a couple weeks if not feeling better?
I had poor luck with NDT, but I would like to give it another try again. I think I may have just been underdosed at the time. Good luck either way. I work with defy now as well, they will get you in the right direction.