Hello I Have A Question. I've Had Two Episodes. The

Hello I have a question. I've had two episodes. The first time was about a year ago. I was sitting in my apartment watching TV feeling completely normal when suddenlyI became extremely nauseous, and dizzy and felt as though I was going to pass out. I dropped to my knees for fear of falling if I did pass out. I grabbed cold wash cloths and pressed them to my face and neck and after about 6 minutes it passed and I suddenly had the urge to "number 2" and to make it worse it was pure water. My second episode was about two weeks ago at my work. I had just clocked out foe my lunch and had sat down outside (I'm a smoker) and I started feeling really anxious. I was diagnosed with anxiety several years ago so at first I just chalked it up to a panic attack. So I got up to go inside to get some cold paper towels for my face and a dizzy spell hit me again. I became extremely nauseous again but this time I got severely hot and started sweating from head to toe. Again it only lasted about 8-10 minutes and immediately I had to run to the restroom for another watery number 2. This is really scary when it happens. It's not accompanied by a headache afterwards like most post ive read but I do feel really drained and tired afterwards. What in the world is going on with me???