Apart from anti-depressants, you could try something like pregabalin.
Don't jump out a window, you'll just end up crippled and with tinnitus and wish you hadn't.
Morbid as it is but just to make it clear, it's quite possible to even mess up something that seems certain like shooting your self, so I really wouldn't attempt anything except medically assisted.
Ideally avoid meds as you know. You could try all the herbal remedies possible. Lemon Balm, Passion Flower, Gotu Kala, Valerian. Like buy all the loose herbs or supplements and combine them as much as you like for a stronger effect. Also, you live in Turkey right? Is there somewhere naturally beautiful you can go? A lake to swim in or a forest? That will make you feel better, probably
Don't jump out a window, you'll just end up crippled and with tinnitus and wish you hadn't.
Morbid as it is but just to make it clear, it's quite possible to even mess up something that seems certain like shooting your self, so I really wouldn't attempt anything except medically assisted.