Eh, nausea tu memang common in pregnancy, especially around second trimester, a few of my mum friends also kena angin dalam dada yang uncomfortable gila at this stage. Tapi kalau it's persistent or getting worse, better check with your doc kat next appointment to make sure everything's okay, especially with the dada angin symptoms sebab sometimes it can be reflux or something else yang perlu monitor. Try makan small frequent meals, avoid makan pedas or oily food, dan banyak minum water, memang helps! How long dah you've been feeling like this?