xherbivorex this is all about being positive, you had the guts/honesty to share your pain on the forum so that shows all is not lost. The trick is to doing something that refocuses you. You really must banish the ” I feel worthless” thinking its so destructive and ultimately self fulfilling.
Every single thing about your future is in your control, it really is and you must find your own way of understanding this,I’m not saying you should not feel pissed off, feeling pissed off and down is a natural reaction but that should only last for a relatively short period of time and then you should refocus and move on with a sense of purpose and energy.
The best way to be mental sharp is to maintain a healthy life style, thankfully every day the weather is improving and with the change of weather should come a change of fortune, just remember to be positive and remind yourself of all the good stuff that yet to come your way, take care and go for it.