Morning or should I say afternoon sickness

I am 6 +2 today and I have been so sick. I was only nauseated and vomitted twice one time per day last week. Today around lunchtime at work I started having sharp abdominal cramping and pain. Ran to the bathroom and started vomiting. I was having cold sweats, was flush and very lightheaded. I looked at my Apple Watch and my heart rate was in the 45bpm-55bpm range and since being pregnant I am usually 80-90bpm. I seriously felt like I was about to pass out. This lasted for maybe 20mins and I have just felt terrible for the rest of the day. No more vomiting or cramping and heart rate is back to normal but I seriously felt like I was going to pass out. Has anyone else experienced this? Any advice?