change in attitude

Every since my pregnancy started my attitude, especially toward my husband has become terrible. It's not constant, but it's almost daily. I'm mean, not happy, stressing myself out and half the time I don't even have a reason. The other half of the time it's a dumb reason. My other pregnancies I was not like this. I don't know what to do about it. It's like I have no control whatsoever over it. Not only is it not fair to my husbsnd, but I know the stress is not good for myself or baby. Any suggestions?