Passed out for unknown reasons?

Today my momma was dying my hair, I was kneeling on the floor of my bathroom which the door and window were both open. I have never had an experience like this before that included hair dye. I have dyed my hair numerous times. I just all of a sudden got very nauseous and dizzy, I couldn't see straight. Then the next thing I know my brother in law was dragging me out of the bathroom and I was trying to tell him I was fine and could walk on my own. Lately I haven't been sleeping right...well I never sleep right; I have insomnia, I have been having this stomach problem since Easter that everything I eat hurts my tummy, my doctors have not found out what is wrong with me yet, plus I have hypothyroidism. I don't know what happened? It scared me that's all I know.