Since I've started hrt (June), my estradiol dosage has been changed twice. Each time I was given a higher dose than before. In my experience, dosages do make a big difference. Perhaps the time issue is part of it, but I have seen a lot more happening ever since my hormones were increased to their latest dose (October). In my opinion, that increase made a huge difference. So, maybe low dose Estradiol works for some, but it doesn't seem to compare for me. In any case, I wouldn't fear. Most doctors start you slower and move you up in time. The goal is to get your body adjusted to the hormones before exposing it to a high level. And of course, there are also safety concerns involved with hrt, so they probably want to monitor you and start you off slowly to make sure you're okay. I know it's frustrating, but the changes will happen. It just takes time.