I just had my vitamin d levels rechecked and they came back at 14!

When my initial d deficiency diagnosis was made my levels were 20 and my endo put me on a regime of 50000 IU D weekly. After 3 months it only went up to 22 and in another 3 months to 30 at which point she changed me to a daily regime of 2000 IU D3. That was in September...so from September until now it dropped like crazy!! I know it is typical for people's D to drop over the winter months, but that much and while taking a supplement? I have not talked to my endo yet, just saw the results online.

Anyone else deal with this? Was it determined that you did not respond to supplementation?