Aww mama, that sounds really uncomfortable! Pero please get checked by your OB na talaga, especially when you're pregnant, kailangan ma-rule out kung ano talaga ang cause kasi may iba't ibang reasons para sa init at kati. A few of us mums experienced similar during pregnancy, and minsan skin changes lang talaga siya dahil sa hormones, pero some cases need proper check-up lang. Don't wait pa if it gets worse, okay? Your doctor lang ang makakapag-assess ng tama para sa baby niyo. Hugs, and please go soon!