Have been off 10mg citalopram since wednesday, after taking it for seven weeks now i think i have withdrawals having pains in my head and heart is racing. the reason i came off due to getting insomnia, my doctor suggested i try setraline, so i was to cold turkey the cit until starting that but i have decided not to..would i be able to go back on the citalopram? i wasnt taking it early in morning but in afternoon