I just had my Lil girl Friday and was 38+5 and since 37 weeks we stopped having sex because my dr had started doing the pelvic exams to check cervix for dilation and he could feel her head already. Weird. Nonetheless if he could feel her head just doing the exam my fiance definitely would have been pokin her... haha. Soooo. You may have just irritated him/her. I think there are alot of possibilities.