Headaches, fatigue, restless legs

I’ve been dealing with daily headaches, frequent fatigue, restless legs, etc for at least five years. It’s been so difficult for me going to lots of doctors appointments, trying who knows how many prescriptions with little if any help. Back in 2020 I had ferritin of 16. It was checked again a few years later after starting some iron and was at 70-90. It was checked again this year and it was 42. I know the 16 was low, but is 42 a relatively low, potentially symptomatic level for a male in mid 30s even if technically still in normal range?