I can hardly function 😩

For reference, I’m a 47 yr old female. I’m curious as to if my doctor is going to send me for an iron infusion. How long could it take to get my ferritin levels up to normal range? I hope it doesn’t take too long to get my levels up. This is negatively affecting every area of my life but it’s especially affecting my job; my productivity has dropped drastically and I can tell my boss is getting frustrated. I’m also extremely moody and have no patience, although that could be the perimenopause lol