Uy, mama, please go see your doctor or OB agad about this, ha, kahit konti lang kinakain mo, ang shortness of breath at tight tummy in third trimester needs to be checked, kaya don't wait. It could be something normal na ramdam lang ng maraming preggy moms (like uterus pressing on lungs, or food sitting differently), pero only your doc can make sure you and baby are okay. A few of my mum friends experienced similar, pero seryoso, kailangan pa rin ng check-up kaya go na to your OB, okay? Rest muna habang naghihintay ng appointment.