Dear Mari
those side efffects are most likely transitory ... 4-5 days may not be enough though. if running the gauntlet is not doable, perhaps you would consider a temporary dose reduction?
are the pills divisible? maybe you could drop to 5mg for the rest of the week until you feel less sedated. then go up to 10 on a friday so you can get more sleep over the weekend if need be.
it is good that you got all that sleep. sorry about the brain fog and the headache and tingling though.

i did get a headache the last time i started Zoloft - at 50 mg. it dwindled to a trace after a week and disappeared after 10 days. but i bet if i had started with 25 mg i'd have been ok.
the smaller the dosage increment, the easier it is.
being sleep-deprived may also be contributing to these symptoms, and if that is the case, you may feel significantly better after another few doses
of sleep.
i hope that, by hook or by crook, you get to feel better soon.
~ waves ~