Sertraline update 6 mo later more smoke drink

i started sertraline 50mg after a breakdown in feb so i've been on it for over 6 months. i was off work for 6 weeks n stuff improved like my ocd and eczema but im not myself. still feeling down, small things trigger anxiety. sleeping a lot from 830 pm til 6-7 am, drinking more than before (at least double the recommended units per week), eating junk food & started smoking which i never did in all my 43 years. trying to do stuff i enjoy, exercise daily, meditate n takke multi vits, ginkgo and ginseng but if anything im worse now. could it be side effects or is it just not working? dont know if should try halving or doubling or go see gp and switch meds. anyone had similiar issues on this?
thanks