Thinning on one side..

I've been using Fin 1mg for 9m and and have used MinoxMax 15% with AA for the past 6m (once in eve) which I recently stopped using for 3 weeks.

Almost over night, I've noticed one side of my hair at the front has thinned much more than the other - is this normal?

I'm really worried and wondered if this is likely to be the effect of coming off ************ for 3 weeks, hair shedding, the normal hair cycle or I'm losing the battle?

If anyone can advise I'd be really grateful.

Thanks