Developing Lactose intolerance?

I ate a grilled cheese about a month ago and woke up violently vomiting it up. Then Thursday I had cheese fries and was SO SICK all weekend... I was like 2 hours from a hospital and SERIOUSLY thought I needed to go get my appendix out. MAJOR stomach cramps I couldn't walk. I didn't eat Friday and Saturday. Am I like having a hard time with the grease? Lactose? I am so confused and I LOVE CHEESE!!  Lol sad