Potential signs of pregnancy include missed periods, nausea, and breast tenderness. Pregnancy occurs when sperm fertilizes an egg, which can happen even from a single encounter. If you’re concerned, I recommend taking a home pregnancy test for clarity. These tests are widely available and provide quick results. If positive, or if you have lingering doubts, please consult a gynecologist. They can offer personalized advice and support. Remember, you're not alone in dealing with this, and professional guidance is always available to help you through your situation.