Uy sis, measles during pregnancy is really something na kailangan i-monitor closely, please follow your OB's advice talaga, at if your symptoms get worse or you feel anything unusual, go to the hospital right away, okay?
Honestly, I haven't personally gone through this, pero a few of my mum friends say their OBs were very hands-on with monitoring, kaya trust your doctor, they know your full situation best. Strength to you, mommy!