I felt the same way you did around that time and I didn't have Oscar until 39wks.

It sounds like bubs head is moving down which will cause the pelvic pain. Your body will most likely start going through changes and preparing itself for labour which is why you are probably feeling a bit off. Hang in there babe, it's not long now. Try and enjoy these last few weeks of pregnancy and take yourself off for some pampering.

HtH *mwa*