Once your blood levels are stable, you shouldn't have as many ups and downs. Since the hormones are new, relatively speaking, to your body, your physical changes may continue for a while. Its much like going through a second puberty. As far as the levels though, once they stabilize, they will only change if your Dr. changes the dose.
The FDA has cracked down on a lot of medications, including hormones, so testing is done more frequently than it used to be. Apparently, they feel that Dr.s are over using hormones the way they used to over use valium in the fifties. Ads on T.V. talk about hormones making you feel better, and we are a society of getting our problems solved with medications that aren't needed which spoils things for those of use who do need them.
Your Dr. should be able to give you some idea of how long it will take for your levels to even out. Never be afraid to ask questions. Its your body and you have every right to know what is going on. Don't feel like you have no control. If a Dr. won't try and answer you respectfully and truthfully, then its time to look for a second opinion.
sam1234