Floating between 25 and 50mg, advice?

started on 25mg about 6 mos ago (switched from lexapro) increased to 50mg about 4 mos ago.

I didnt feel much affect from being on 25 but on 50 my anxiety amd depression really settled down and I was really functional for the first time in a while. I was sleeping regularly and not super drowsy. I stopped having panic attacks and anxious spirals

the downside though was the awful brain fog and fuzzy memory. I really struggled to remember things in the short time. I wiuld literally forget a word I was about to say midsentence. if I didnt write something down the second I thought about it I would just straight up forget.

Im currently about 2 weeks into trying 25mg again and while the brain fog is pretty much gone, ive been having really bad insomnia and my anxiety is higher than it has been.

I wanted to see if anyone else has had this same issue and what they tried or ended up doing?

Im not sure if doing an in-between dose would work or if switching to another medication might be better? Should I consider going higher than 50mg?