DS was born on a Saturday. The thurs. night before I went into labor, DH cooked some pork (which we rarely eat) on the grill. That night in bed I had nightsweats and nausea. I kept insisting I had trichinosis from him not cooking the pork well enough or something
I even debated having him call the midwife to ask what we should do.
I felt better the next day. That night we went out to dinner w/ friends. My water broke at 8am the next day.
I had some night time nausea the past 1-2 nights, and I am contracting more, but nothing regular (I'm 39 weeks today). So far it hasn't been predictive but I think for me it signals the start of some kind of hormonal shift (I would think that could lead to nausea). I've also been VERY hot the past few nights and had to turn on the AC and fan last night to sleep.