i've been on & off minoxidil and let me tell you, it works on a 4-month delay, EXACTLY....there's no signs of it working 2 months in. up until four months of using it i was still shedding heavily, on and off for weeks at a time as i always was prior...after that 4-month period and for the next 6 months of using it, i never noticed any periods of excessive shedding as i had before, and my hair was noticeably thicker on top.
overexamining my forehead as i always do, i decided that because my hairline was still receded that the minoxidil wasn't working. i was a moron and i attributed the much better looking hair to the fact that i take better care of my hair now--i eat better and take vitamins, no bleaching, no styling products, etc....
so, i stopped using it. exactly 4 months passed, and i remembered real quick how awful it had looked before and why i had taken action. i shed all my new growth in about a week, now i'm back to the original amount of shed. ....needless to say i'm back on minoxidil and eagerly awaiting the 4th month again.
i'd say if you've only done it 2 months, you're just experiencing your normal shedding and nothing related to minoxidil.