New hairs grown but not getting longer?

I've grown some new hairs on my receding hairline through a change in diet, derma roller, saw palmetto pills, msm pills, and coconut oil. and their very short in length and they grew within a month. However it's been 3 months since I saw the new tiny hairs grow in and I don't think they've gotten any longer and I think like 30% of them actually fell out.

Are there like different types of hair that can be grown like baby hairs that don't get long there just sort of like peach fuzz? And if so how can I just grow back like regular hairs, not like these baby hairs? Or how can i get these hairs to grow longer?