Hi First_Time_Mummy,

It might just be the relaxin hormone kicking in. It makes everything loose and roomy in your pelvic / tailbone region which helps with the birth but doesn't really help with the carrying your baby around for the rest of the pregnancy!! If only we could turn relaxin on and off when we wanted!

If you do find yourself getting too sore, go & see a physio specialising in Womens' Health. They will sort you out with some exercises to help strengthen or stretch the muscles that are causing you this pain. I can't recommend this highly enough, as I suffered with bum pain for ages and one visit to the physio and I was a NEW WOMAN!!

Good luck & HTH