Hi Relle
It is normal. It is caused by a hormone called relaxin and with a little help from progesterone it helps to loosen all the joints of your body in preparation for birth. Unfortunately for you it has hit you a little earlier that most and by the sound of it you have been hit hard. There is very little you can do about it apart from give birth. Hot/cold packs can help. Panadol/panadeine does help a little but remember no more than 8 tabs in 24 hours. Change position slowly especially when rolling over or sitting up in bed.
A few other things that may help.
Call DP lots and lots of nasty names.
Hit/kick/punch DP in groin ‘by accident’
Kick the cat

LOL