Hi Cara,
Excellent idea. I had B-12 deficiency after the birth of my third child. I had weekly shots. I don't know the b-12 count, it was a long time ago. I had 6 pregnancies.

The shots continued for a long time, then went monthly.
He then he put me on oral b-12. I have taken that for eons, still do. I take 1 gram a day and my tests show around 980 now. High, but normal.
I couldn't get off of the couch after my third child. I was glad the GYN was knowledgeable to these conditions. I had low Thyroid back then too but was taken off the med after 10 years, by a doctor who said my Thyroid tests are fine. Yes they were fine because I was on the Thyroid med. Duh!
Now with a goiter and many nodules later, I tested hypothyroid with a new doctor.
The Pharmacist and Endo doctor, told me what to take and not to take with the med. Gave me a list. No food one hour, no iron or antacid tablets for four hours and many other no-no's that do not agree with the Thyroid meds. Birth control and HRT affect it too. I didn't have that knowledge when I took it years ago. Hmm