This is my first pregnancy so I am not sure what to expect. I am just short of 17 weeks and for the past week I have been feeling a heavy discomfort in my bum cheeks and lower back, sometimes times I can't work out if the heavyness is and worry it is my cervix. I am seeing my midwife Tuesday and I didn't want to call before in case this was the norm. It is making me miserable now though and I can't help but worry.