I was 5 months on an ssri-type antidepressant before starting hrt and the ssri did very little, if anything, for the perimemopause symptoms. It helped a little with anxiety and sleep but that's all. Not enough for me to not add in hrt.
I agree with Flossieteacake, and wondering whether you could try just the gel for a couple of weeks. If you're okay with then, then experiment with progesterone, perhaps vaginally (you can use utrogestan that way) or rectally (if they'll give you cyclogest). Lots of ladies on here have said not taking oral progesterone and using another route reduces the side effects. I've only ever used it vaginally so have nothing to compare it to.