Eh, shortness of breath and tummy discomfort boleh jadi banyak things, so do get yourself checked with your doctor or midwife soon, okay? Especially since you're pregnant, better safe than sorry. A few of us mummies experienced similar things during pregnancy and turned out fine, but each person is different so kena proper check-up. Take care of yourself, and jangan delay if it gets worse or you feel dizzy or anything.