Post travel depression

Hello everyone, I need your advices and help, I just returned from a beautiful trip whjhc acted like a total salvation from my problems regarding mental health, and right now I am right back in my own country, I feel broken, shocked, terrified too, I don't know how I am gonna endure here, but the destination I visited was only 160 km away so it is extremely close not some far off place but my brain is screaming and crying at me 24/7, I don't want to be like before, I want peace I want to live normally, please help me and don't leave me alone in this terrifying situation, I am only 15 which makes this even worse, since my emotional brain is developed but my logical brain isn't fully developed till 25