Yung parang nagpupush na nararamdaman nyo, maybe the baby inside your womb is nagulat sa biglang change position mo or di sya kumportable sa position mo. If after ilang minutes nawala na yung push effect, maybe naka adjust na sya. Pero if it lasts na medyo matagal, you may consider othe positions para comfortable din si baby. Walang bad effects to kay baby. Dont worry