Am I pregnant, or am I panicking over nothing?

Patient: I had sex on Wednesday (today is Sunday) my stomach hurts, I think it might just be my digestion being slow, but I’m having a panic that I could be pregnant, even though I’m on the pill and we used a condom which didn’t break, I think it’s just me over thinking things, I need my mind put at rest

Symptoms: Sharp pain in stomach, not often, only last a short time