Depressed?

I have been so moody and irritable, I'll be 16 weeks tomorrow, but what I can't figure out is if this is normal irritable/moody from hormones or if I'm dealing with depression. I still like my husband and kids but don't want to be around anyone else, don't want to leave the house, am super tired, wish I could sleep all day, have to force myself to keep up with all the housework, and am grumpy at everyone, BUT I am over the moon thrilled and happy to be pregnant. I know, crazy :/