Too much lexapro maybe?

I’ve been on lexapro for 6 years. When off for a week cold turkey on accident. Worst 4 months of my life following that. I was all messed up and dealing with prolonged withdrawal symptoms even after I reinstated. Long story short when I first took my lexapro 6 years ago, it changed my life for the better it was amazing. I forgot anxiety even existed. Once I accidentally cold turkied, got back on it hasn’t been the same since and it’s been 2 years. I feel overstimulated all the time, teeth grinding, little things bother me, certain noises bother me, anxious from time to time, tired all the time. Is the dose i’ve been on for 6 years too high for me now after I cold turkied? Or is lexapro just not working for me anymore?