Felt sick

I made dinner and didn't eat it. Then when I sat down I got really hot and dizzy and felt extremely sick. I took a warm shower and laid down in a dark cold room for a little while. Felt better but not 100%. Anyone else get weird sickness like this? This is the second time in a month it has happened. Our house was hot both times. And yes I've been drinking water all day long so I don't think its because I am dehydrated. (I see my doctor Wednesday and plan on asking her as well)