Mama, please see your OB or go to the clinic soon, hindi dapat balewalain ang ganyan, lalo na habang pregnant ka pa. It could be something na kailangan i-check agad, especially since masakit at may bukol.
A few of us moms had similar concerns during pregnancy and breastfeeding, kaya alam ko it's scary, pero ang best talaga is to get it checked out professionally so you can relax and focus on taking care of kuya and the baby on the way. Wag mag-self-treat lang, okay? Mas safe para sa iyo at sa babies mo. Let me know how it goes, sending you a hug!