But are you taking it with a meal that also contains fat? Vit D requires fat in the gut to be absorbed so it will work much better if taken with a meal with fat or when you do take it, have something like some peanut butter with it.
I did this and my levels went up. But do keep an eye on it, don't want to get toxic on it either. You are in the positive range but if you want it higher, try to fat trick and watch your numbers.
I know that it's within range, but posts I've seen here talk about how you should be around 50 or above, or you should be taking supplements. The fact that I AM taking supplements, and such a large amount, looks to me like there's no way I should be that low, and it concerns me because I have EXTREME fatigue issues.