crazy mood swings

I'm 34w4d and this whole pregnancy my hormones have been smooth sailing. My boyfriend and I have been getting along great, no arguing ever, and I've been super 'chill'. But these past couple of days I don't know what my problem is. I'm easy to cry on the dime. I'm snippy. I just want to spark an argument with him over nothing. I'm needy and want him to love on me more than he usually does. My emotions are literally all over the place. I don't know where this all came from, but I feel crazy! Please tell me others are having these little episodes too.