Fue and grey hair

[Acorn87]

Hi , my first post and looking for anyone who has experience any of my issues,
First of all I’m 39 years old and after a few years of research I finally went for a hair transplant (FUE) in February, everything at the moment is going well on that side apart from shock loss on my donor area which is just recovering. Around my shock loss I had a patch of grey around the area, and then it started all the way around the donor area after 2 months in . The last 4 weeks my top part of my hair is going grey at a incredible rate . Before HT op I had very little grey and is concerning me at the rate it’s changing . Not sure if it’s a factor but I’m currently taking finesteride and minoxidil, biotin, multi vits.
Is this common?