Hello, and thanks for your medical question on E Health Forum. I am glad that I can help you.
From the history provided, the recurrent respiratory infections could be most probably due to immune disorders. Here production of antibodies is affected, hence the ability to fight common infections is reduced.
The underlying cause can be determined by consultation with a immunologist, who can examine you, and evaluate the underlying condition with additional tests.
Your labs seem to be normal. Since the labs before initiation of the bovine endocrine preparations have not been provided, it is difficult to interpret the results. But the current results provided are within normal limits.
You might consider consulting your doctor or a endocrinologist for advice on continuing them.