Hello, I Tried Minoxidil 5% From Costco As I Am

Hello, I tried Minoxidil 5% from Costco as I am loosing my hair. But, after a few days, my scalp got quite irritated and red. I stopped for a week then tried again hoping I would not have that reaction again. But it did. It has been now maybe 3 weeks without using it. But I now have a huge amount of dandruff coming from, what it feels like, a white crust I can scrape with my fingers.
I just watched a video on Youtube of a testimony of a guy who used it and he says that, at the beginning, he had such problems and his whole scalp kind of peeled off twice before stopping.
First, is there any danger to it?
Second, since it seems to be a normal reaction (maybe), should I give it a an other try and not stop this time?

Thanks in advance,
John.