Worried about cramps / "pulikat" in my groin area

Due date is on 19th this month and I'm feeling worried about sudden cramps in my groin area particularly my singit (left and right). I always feel the pain everytime matagal na nakaupo or nakatayo and naglalakad.. 3 cm na ko and I wonder if mararamdaman ko rin to during active labor phase pinaglalakad pa rin ako ng pinaglalakad ng OB /midwife ko