Pregnancy cause body to reject Advil?

Patient: My boyfriend and I are trying for a baby, and ever since then whenever I take Advil I get really bad stomach pain and diarrhea within 30 minutes. Could this be a symptom of being pregnant?

Symptoms: Very bad stomach pain in the lower abdomen within 30 minutes of taking Advil or Aleeve. Shortly after I have diarrhea two or three times over the next 2-4 hours.
This has only started over the last month when my boyfriend and I started trying to get pregnant