Aw, first time mom! Yes, totally normal pa rin yan kahit 15 weeks na, marami sa amin ang nag-experience pa ng nausea and heartburn throughout pregnancy, hindi lang first trimester talaga. A few of my mum friends said their morning sickness went away lang around 16-17 weeks, kaya baka malapit na for you, but everyone's different! Try eating small frequent meals, avoid spicy or oily food muna, at drink lots of water, yung ginger tea and crackers din talaga game-changer para sa amin. Best to check with your OB pa rin though so sure na everything's okay and she can recommend safe options if kailangan ng relief. Kaya mo yan, mama!