25mcg of estrogen is an incredibly low dose for someone this early into peri-menopause. The younger you are, the higher the estrogen level you need to be symptom-free - so you likely need at least 75-100. One approach to fluctuations is to take quite a high dose to override those fluctuations. You should have a blood test done ideally during your period (when your own estrogen is always going to be low) to see what you are actually getting/absorbing. My hunch is your symptoms are due to your own body's fluctuations and you aren't really getting much at all from a 25mcg patch.
When dealing with fluctuations during peri, that's one reason for the relatively high doses of estrogen: Your own body's fluctuations are going to be much less impactful if you have a steady and relatively high dose from HRT. My Newson dr says estrogen usually needs to be 400-600pmol for women to be symptom-free during peri. That is much higher than the doses most doctors tell you you should be happy with, which can be around 250pmol. So one approach to the fluctuations is to take MORE estrogen. Your own body shouldn't make much of a difference then, to the overall levels.
But if you are getting side effects then from too high estrogen, you could either take additional utrogestan to compensate for the higher estrogen - or you could go off piste a bit and adjust your estrogen dose as you suggested. To be able to do that, you will need to get more from the doctor because it's easier to be prescribed 75 and reduce that for a while, then to be prescribed 25 and use up your HRT too fast.... So get onto a higher prescription, either way, if you want flexibility.
@Tootsie there's no problem with 'breast density' increase. Younger pre-menopausal women naturally have more dense breasts because their estrogen is naturally higher. In the way way, taking estrogen will make breasts more dense often as well. Why does that scare you? It's nothing to do with breast cancer and it's not a risk factor. The fact is that younger women have lower risk of breast cancer than older post-menopausal women who have lost their own estrogen... Sounds to me like you still have worries about taking HRT at a sufficient dose to be helpful, and you'd be better off addressing those worries and laying them to rest than staying scared of taking enough estrogen.