I have a question about early pregnancy!

Victoria🌻 #2 due April 2019✨

So today I had bbq for lunch. About and hour or 2 later I started getting super bad stomach cramps. It felt like gas cramps x100. I laid down for a few hours and it's still hurting some and sore feeling. I'm 3 weeks 4 days according to this app and don't have a dr appt til next Tuesday. My minds going crazy a friend said she had it too in early pregnancy but I don't really remember pain this bad with my first child. Any help is much appreciated y'all! 😘