hi...The thing with antidepressants is they can boost the "happiness chemical" (serotonin/ noradrenaline) in your brain if there is some activity done to produce them in the first place..its a very simplified explanation I'm giving, omitting all medical/technical terms.

so dear, please indulge in something that might have been somewhat pleasurable at any point in your life..or find some new interest..

exercise, moderate at least, is known to produce another type of "feel good" chemical (endorphins), which also helps in the action of the meds.

your hypothyroidism has only made matters a little worse for wear, but try overcoming the avolition and it would do great.

hopefully i have been able to suggest something worthwhile for you.