Hay, that lightning crotch feeling is totally normal this late in pregnancy, a lot of us moms felt that din around this time, it's usually the baby's position or nerve pressure, pero since you're having ongoing pelvic pain and cramping after your check-up, better message your OB or go in para ma-check lang, kasi sometimes the cervical exam can trigger cramping but persistent pain is worth getting cleared on, especially since you're so close na sa due date. Fingers crossed it's just your body getting ready, pero better safe than sorry, your peace of mind matters din!