It happened to me during my first week of PCT and a friend of mine during his last. However, in both cases it went away in a few days and hasn't been a problem since. I also don't notice any difference in my hairline compared to before the cycle. I'm not an expert by any means but from what I have read on different forums you should be O.K.
My dad's the same as yours and so is my mom's dad so I know I will lose it