Do I have depression?

Hi. I am 20 and female. At the beginning of April, I hit a big depression. It came out of nowhere. It lasted about a week and was terrible. I was very sad and couldn't eat hardly anything. I lost some weight. I've came out of that deep depression. But since then I havent felt the same as I did before it hit me. I feel like a different person. Life feels different. I sleep way too much and still manage to feel tired throughout the day. Things that should make me happy and are enjoyable don't/aren't. I don't do anything I used to do. I don't hang out with my friends anymore. It feels like there's a fog over my brain. It's literally hard for me to think and concentrate and learn new things (like at work). Things that would usually make me feel bad don't. I guess I just mainly feel empty. I can be happy on the surface. But it doesnt get much deeper. I hate feeling this way. It keeps me from feeling much towards my boyfriend and it's keeping me from being close to God. Can someone give me any advice?