Hay nako, mama, belly pain sa pregnancy talaga dapat i-check ng doctor mo agad para sure na okay lang ang baby at ikaw! Hindi kami dapat mag-guess sa ganito, lalo na ikaw ay 18 weeks pa lang, mas safe na makipag-ugnayan sa OB mo today o bukas, or go to the nearest clinic kung sobrang sakit na talaga. The heaviness at gassiness you're feeling might be normal pregnancy stuff, pero kailangan nyang i-assess ng doctor mismo. Habang naghihintay mo ng appointment, rest lang and take it easy ha, aahin mo lang ang stress mo pa. A few of us mums swear by just staying hydrated, light meals, and avoiding super oily food, pero yan lang temporary lang para sa comfort, hindi po cure. Please see your doctor soon, okay? Don't wait. How severe is the pain, sis?