Am I Suffering From Depression?!

it's not really like i have any particular reason to cry. i dont know, really. i dont know. i am so tired and all i knew was i wanted to go to sleep so bad. i turned off my lights and i lied on my bed and i tossed and turned and i cant go to sleep. i got up and turn the lights on and suddenly i just burst into tears for no reason. i feel like i am numb and i feel nothing, no sadness no anger no happiness. but i just burst into tears and sobbed harder and harder. i reached for the bible and open it in front of me and i wanna just kneel down and pray or something. i dont know whats wrong with me!