Depressed and cranky!

So for the past 2 weeks I haven't been feeling like myself. I'm really cranky, always really tired no matter how much sleep I get, I'm not very hungry and I've started losing interest in normal day activities. I don't know what to do! Somedays I am so frustrated that I start crying. I am just not myself! I'm constantly yelling and giving people the cold shoulder without really realizing it. Should I talk to my doctor about medication? Am I actually becoming depressed or just a cycle? I'm scared I'm going to drive people away!