Please help understanding monotherapy vs AA

I have been on monotherapy for the past 20 or so days but my gf (also MTF) has been told by her doctor in a private gender clinic that monotherapy is significantly worse than Anti androgens and is much much slower. I am really stressed and trying to understand if thats true, if I will have the same affects on monotherapy as on anti androgens and wheather I should buy anti androgens and start taking them instead. Tysm in advance <3