I became hypo again taking the "new" Armour. After years of successful use, my levels fell to where they were in my first few months of treatment and taking only half the dose... Thus, the new stuff is about 50% less effective than the old was for me.
If you can get additional Armour, try asking for a dose increase of at least 25%, up to 50%, and see if that helps. I was unable to find more Armour in August, so I switched to Nature-throid at that time. I found that 2 grains worked well as a substitute for the 2 grains of old Armour that was previously working. When I recently needed a refill, I couldn't get N-T but found that Armour is once again available in my area. I didn't want to trust Armour and go through all that again, and I couldn't get Nature-throid. So I bought 30 days worth of compounded natural thyroid in the hope that N-T will be available at next refill time. It really irks me to buy the compounded, because it costs $1 a day when N-T costs 25˘ a day... But one does what one has to in times of crisis.
As for the vitamin D, my doc recommended "at least" a 2000/day intake after my level tested at 30. I took it faithfully, but it failed to raise my level in any meaningful way. My next test came back at only 32. On the recommendation found at the vitamin D council site, I upped it on my own to 5000/day, got tested again, and it came back at 56 on a 20-100 range. I told my doc what I'd done, and he said to stick with 5000 indefinitely.