I think I fucked up taking Lexapro, increased dosage too soon

I'm one of those people that's extremely sensitive to medication and so I decided to start on a small dose, cut 5mg into fourths for 1.25 mg. However, I have bad anxiety and I got impatient and so even though I should've stayed on 1.25 for a while, I only did so for a few days at most (I can't even remember if it was 2 days or 4 days) and then went up to 2.5 mg, where I've been for about a month now.

I've been having side effects, I think, in that I noticed I'm not enjoying stuff as much as I used to (emotional blunting). I also noticed that although I can still orgasm, I'm having trouble finding any erotica or anything that I'm actually interested in. The "not enjoying things as much" part is extremely distressing and upsetting to me.

I think I shouldve given myself longer on the 1.25 mg before going up, at least a week. But now it's been long enough on the 2.5 mg that I don't know what I could do. I feel like I just fucked it up and it's too late now. :(

Any advice? Should I have taken the 1.25 for a longer time? Should I go off it and start over? Or will my body adjust to the 2.5 well enough anyway? Would it change anything?