Balding after diet change and weight loss.

[fart]

So i changed my diet went to the gym lost about 45 pounds over the span of a year nothing crazy about a pound or 2 a week. But now my hair is rapidly receding. I'm even getting bald spots on my sideburns, is this normal? And I can see hair miniaturization past the the receding temples. Its worse daily, i can see a spot getting bigger or a new line of miniaturization forming again past my receding hairline. In a year I went from a nw1-3. Any help is appreciated.