Bug or pregnancy woes?

35-5 here. 2nd super low drama/healthy pregnancy and for the last 24 hours I have had a hangover-like headache, some blurred vision (went away yesterday) nausea, vomited twice, diarrhea and am just generally uncomfortable. No temp. I have no energy, can’t rest well because every position makes me nauseous after ten minutes. Just when I feel better after laying down for about an hour, I can only muster getting up to do stuff around the house before I succumb to fatigue and nausea again. So, am I just sick with something or is this just the joys of the third trimester?

Update: It was a stomach virus. Not the way I wanted to lose five pounds of fluid lol. Did call the on-call nurse yesterday and we had the same thoughts about it being a bug. All is MUCH better today.