Ay sis, hindi ko sure kung warts talaga yan based sa description mo, but ang ingrown hair or irritation from shaving kaya to especially kung baguhan ka sa pregnant body changes, nangyari din sa isang kaibigan ko at sobrang nakaabala siya! Since you're 26 weeks na, I'd really suggest asking your OB about it sa next check-up mo para sure, kasi sometimes skin changes during pregnancy can look scarier than they are pero better safe than sorry lalo na ngayon. In the meantime, keep it clean and try not to pick, at if it gets more painful or infected-looking (redness, pus) then you might need to see your doctor sooner. How's the rest of your skin doing?