How did she know she wasn't pregnant?

Choices:
A. She was throwing up.
B. She was not sexually active.
C. not enough information
D. She was stressed.
She was not sexually active.
For a month, anything I consumed would result in me rushing to the wash room and throwing up. When this started, I thought it’s something to do with what I had previously eaten which was stale and was having a reaction to bad food. When the problem persisted for a week where I was barely able to keep my food from coming out, I went to visit my doctor. He asked me questions and gave me some vitamins and pills before and after food to stop the vomiting. They didn’t work. Even though I was not sexually active, I got my self a pregnancy test which showed negitive.
I tried to eat healthy, but to no avail. 15 mins was the max my food was inside my stomach. I was becoming weak from all the throwing up and rapidly loosing weight. I went to my doctor again and he said I was stressed. Wrote me some more pills. Nothing worked. My Mom got paranoid and took me to another doctor for a second opinion. The doctor asked me to write down everything I ate with the number of times I threw up for the next 2 days and return to his clinic.
Only then, were they able to diagnose that I was lactose intolerant!! Milk, milk products, cheese, butter, cream, nothing seems to agree with my stomach anymore. Surprisingly this is what I used to eat - cereals with milk, eggs with butter, pizza, pasta, lasagne, cheese with bread, tall long glasses of iced coffee, frappes and bam, my body would reject them within 15 minutes. It was terrible switching from coffee with milk to black coffee, until I started developing a taste for it. Pizza’s are something I still can’t eat. I need to remove the cheese from the slice and unfortunately my body is able to only take one slice of Pizza. Pasta, white sauce is a strict no no unless I want to feel bloated and throw up. So yep. My doctor was unable to diagnose me. Thankfully I did take a second opinion.