Just read periods of tension

Very interested reading
At the moment dont know what to do need advice
Suffered depression most of life have been taking citalopram very low dose keeps me fine dx pd approx 2 yrs ago.
Last hospital app was advised to up citalopram 20mg also because of lack of sleep for approx 6 months having 4/5 hours broken sleep per night given prescription for cionazepam scared to take al this exra medication no energy to the point of cannot f function now what would I be like.? When taken 20mg before turned into zombie mode.

Have app to see G.P. 30th have not started any yet.
Has anybody taken this drug and if so was there improvement
zombie doesn't sound like an improvement!