What Are The Symptoms Of Potential Depression?

Hello Doctor, I am telling you the symptoms of my problem. I feel heaviness in my head, in the centre from above. I feel drowsy and lazy all the day and tired and fatigue at the end of the day. If I speak more for some time then I feel that my head is heavy, restless and confused.i feel drowsiness, weakness, anxiety, lack in concentration, heaviness in my head, laziness and sometime i feel very sad. at end of the day, my problem get severe,i just feel tht i should lie down at once and get sleep bt when i sleep, m not able to get proper sleep. bt i don't have any kind of tension, or niether anything have happened with me for which i should b sad, so m a litle bit confuse that do i have depression or not!! And there is stiffness in my right arm, especially in my fingers. In morning when i get up, my hand is stiff and when I feel pain when I make shape of punch with my hand. So please kindly help me in diagonosing my problem. Thank you.