anti depressants have their place. But in my professional experience they are overprescribed
there are many reasons for this. patient expectations (ie i want something now doc), poor doctoring, lack of timely access to counselling/psychotherapy on the NHS which are just as effective as drugs and in an ideal world would always be my first choice. We also live in a pill for every ill culture- ie your feeling a bit miserable hears a pill to sort you out. the list could go on and on. However antidepressants are often indicated and as doctors are encouraged to screen for depression these days it's hardly surprising their use is rocketing.
Right personal experience, I had a shit year last year losing 2 close members of my family in tragic circumstances 3 months apart. Did i feel shit -yes, did i feel suicidal -hell no. However with time doing things i enjoyed support from family and friends and EXERCISE i got better with time. Did i take pills- hell no as i felt that they would not change the life events that had occurred and were npot the answer for me. Many doctors would disagree with my comments and i try and help patients make up their own mind regarding treatments. Obviously if they are actively suicidal or severely depressed they need treatment or urgent psychiatric assessment
so back on topic, ssris are largely safe Citalopram is frequently prescribed as safe in overdose(relatively) good for symptoms of anxiety and depression and relatively non sedating compared with other antidepressants.
It sounds to me that you feel that you have been given this script as the doctor felt he needed to do something. Obviously if you are not keen to take them you should probably return. But if i were you i'd probably try and focus on the positives in your life, don't dwell on negatives you cant change cos they only make you more frustrated, avoid drugs and alcohol and exercise- endorphins help!
you could also do an online depression screening tool like the HAD score or phq-9
also you could try online Cognitive Behavioural Therapy google moodgym- you might find it useful.
obviously if all else fails get further professional help!