Ay, mama, belly pain sa early pregnancy can be tricky, could be normal stretching, could be something else na kailangan i-check. Since you're at 5 weeks pa lang, kailangan mo talaga makita ng doctor ASAP, ha, para ma-rule out anything serious at ma-ease ang iyong mind. Huwag maghintay, better safe than sorry with pregnancy, lalo na with pains na madalas-madalas. Let me know how you get on at kung okay ka na after check-up, okay?