depression?

Okay guys I know this app really isn't for this but I have to ask as a mom of 2 who stays at home, I have no friends literally no one other then my husband and some family talks to me. There are days I feel good and I'm okay and other days I could break down and cry, like I feel like I'm so ungreatful for the good things in my life and like I should be happy but I'm just not.. I can't find a "hobby" or anything and I'm also only 21. I'm worried I may have a mental disorder considering my family has history of it but I'm not sure... I have severe emotional outburst some days and I'm down right mean like I just stay pissed off and do not know how to deal with emotions... someone please tell me if I'm the only one? I feel so crazy and alone it's kind of emberassing. I'm open to all help and comments