Any clue what might be going on? 35 weeks

Ba

I woke up like I normally do to go pee. Well my stomach got this really sharp pain at the top of my belly, almost under my ribs , more on the left side then right. I got really nauseous so I checked my heart rate. 118 bpm. Well my stomach got really hot and my body got chills. I noticed I wasnt as nauseous so I checked my heart rate again. 85 bpm.