Escitalopram - I am on week 4 on escilatopram, was feeling good week 2 and now week 4 I have brain fog , some headaches and a bit of dizziness. Is this normal and how long can I expect side effects? I am on 10mg. How long should I give it before thinking its not gonna work for me. Only change I made was I went from taking it at night to the morning as it was keeping me awake.