Ay nak, I know it's scary especially pag matagal ang OB mag-reply! Since you're already 18 weeks and may pain, please don't wait, go to your clinic or ER na lang para ma-check agad, okay? Ligtas lang and mas magiging peaceful ang isip mo once checked na.
A few of us moms in my circle nag-experience din ng ganyan during pregnancy, but talaga dapat ma-rule out agad ng doctor kung normal lang or need ng attention. Message your OB again or find a clinic near you na ready mag-check today, ang peace of mind mo mas mahalaga!