It's due to Gestational Diabetes..also hormonal changes and some people starting third trimester feel this.. doctors sometimes prescribe safe inhalers for this till end of term so once ask your doctor about this

one insulin has been started from 3month it will last before 3day of dilvery date..

Hi<br> It's due to the hormonal changes happening in the body. She should drink a lot of water. Hope her bp is normal<br> Tc