Salam! Sakit perut yang diikut dengan urge nak berak is actually quite normal in the third trimester, sebab baby yang besar dah pressing down on everything la, plus hormones tu memang boleh affect digestion. Tapi sebab ni first pregnancy you, baik la jugak check dengan doctor just to be sure everything's okay, sometimes they can tell you exactly what's happening and set your mind at ease. Take care of yourself, and jangan worry sangat ye!