Feeling overwhelmingly nauseous

31 weeks 5 days today. I was laying down after having a great day and feeling pretty good just a little tired all day when I suddenly got overwhelmingly sick to my stomach out of no where. Trying to sip some water but this caught me off guard. Checked my blood pressure just because wondering if it was off because I have hypertension but it’s perfect. Anyone else been sick to their stomach suddenly? I wasn’t having any stomach cramps but as I’m writing this starting to get some. Wish I could just be sick to get it over with and be able to sleep.