How long does it take after beginning armour thyroid to feel the improvements in your health, and how long before calling dr. if not working?

It depends: It takes weeks to months to improve symptoms related to hypothyroidism, but it also depends on how low your thyroid level was before starting treatment, and what symptoms are related to the thyroid as opposed to other reasons. I have seen many people with marginally abnormal TSH levels, who did not note improvement in symptoms despite normalizing their levels with thyroid hormone.