Hay, anak, that's something you really need to check with your doctor right away, hindi dapat i-brush off ang ganyan, lalo na kung first time mo or parang off sa iyo. Better safe than sorry talaga, no?
A few of us mums talk about this, and talagang inconsistent kung normal or not depending on the person and kung ilan buwan ka na. But honestly, kunting odd feeling or worried ka, go na agad, your OB lang ang makakasabi ng tama. Praying it's nothing serious, pero don't wait, ha?