It is good to hear that the vitamin D is working for your depression life is so hard to work through as it is little lone with depression. My husband who has mental illness problems swears by his "B' Vitamins...
I find that a deficiency in any vitamin or mineral can really play havoc with your health especially if it drops right of the scales that is why I think for most people they should have their levels check every year.
I was vitamin d deficient also.
My Endo has me taking 1000IU of D3 a day, and my last test showed my vitamin D about in the middle of where it should be. It sounds like I will need to keep taking it for a while, at least. My Endo didn't say anything about discontinuing it.
One nice thing is it has reduced my depression considerably.
I take my synthroid about six in the morning, and wait until about eight to eat anything. I have to take other meds with food about eight, but I made sure the other meds wouldn't affect absorbtion of the Synthroid.
I take the D3 and a multi-vitamin at lunch. I don't know how all that is affecting my TSH level, because I have not been stabilized, yet.
I would take your synthroid separately from your Vitamin D...Synthroid should always be taken on an empty stomach and one half our before you eat anything...The Vitamin D could be blocking your Synthroid intake...Mary
Your TSH shows quite an elavation. and supplements along with other medications can alter your dosage.
I would call your doctor - but depending on your needs for your Vit D is sounds as though your Synthroid will need to be changed.