Read the thread that was linked above. It takes time to learn how to do this and minimize health problems.

Blood work ....again read the thread, but there are several places online where you can purchase lab panels, have your blood drawn locally, and then they will email you the results or link you to their patient portal to view your results. Privatemdlabs, Ultalabtests, Questdiagnostics, etc. You just have to do some leg work online.

By your questions, I can tell you haven't read the thread that was provided earlier. If you had read the thread you would know there is no need to taper off, you really need to read the thread and understand why you do certain things and what is the proper way to do them.