Having strange episodes...

I am 5 weeks 2 days and twice now I've had strange episodes in the mornings where I get out of bed with pretty bad cramping, I go to the bathroom and feel dizzy and like I'm about to pass out and throw up and then I get covered in sweat. I have to sit with my head between my knees to keep from passing out. It passes and I usually feel better once I've eaten and relaxed a bit but I'm not sure why this is happening. Anyone have any experience with something like this? I feel like it's either low blood sugar or just a reaction to the intense cramping. Any help or anyone that has experience with this would be appreciated!