initial shedding, how much is normal?

[lucrio]

hello,i am new to this site as I have only recently begun treatment for my mpb. I am 19 years old and have always worried about losing hair as it is very common in my family. I am currently taking .5 mg of fin daily and have been doing so for close to two months now as I noticed quickly signs of mpb in my first year of college. I began to notice an increase in shedding as soon as a week after starting finasteride. now the shedding has become noticeable (to me atleast) on top and I almost have developed a small bald spot ontop. im just wondering if anyone else has experienced initial shed (which I know is not uncommom) and if so is there any reason I would be shedding too much and maybe even permenantly. any respones would be greatly appreciated.