Suggestions???

I have constantly felt down for the past few day, it might just be the hormones but feel blah... 22 wks.   I worrie about everything from money, to cooking and taking care of the house as well as I work full time. I have 3 other children and I feel like I'm their maid and they are worse at picking up after themselves now than ever and I feel very short tempered with them and my DH and just ready to cry for no reason. Any suggestions???