Did anyone know what would cause this?

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This evening while getting dressed to go out, I noticed my stomach kind of hurt, and my head felt kind of weird, but I'd just woke up from a nap, I thought mabe it was related to that.. but then I started getting really, really hot! Like I don't usually sweat very much, but my back and arms were soaked, and I was super shaky.. it lasted for probably 10 min, while I tried to cool off drinking ice water, and eating popsicles.. when I was starting to feel better, I checked my blood pressure (I have no history of pre-eclampsia or high blood pressure) and it was 129/67.. It usually runs 95/60 or thereabouts, so it was kind of high for me, but not in the scary high range yet. I'm just wondering if anyone's had this, or knows what it could be? I'm 26w4d..