I was on zoloft for several years 100mgs with no or very little side effec/ts....doctor started me back on them 3 months ago do to anxiety/depression at the same dosage and increased to 125 mgs for the past three weeks....since going back on the zoloft I seem to be in a fog\heaviness in forehead but depression and anxiety has gotten much better....is the fog/depression still after 3 1/2 months do to dose being to low or high or need to switch antidepressants....i suffer more from anxiety