Ok this is probably really normal and stuff but it hurts like hell!

For the last 3 days i have been getting really bad lower back pain,almost at the back of your hips when i stand or walk.It feels like i have to walk in a certain way to control the pain there.
Is this baby going down? or just the extra weight? being a blimp and all!

No idea but I was awake for ages last night because my lower back was aching more than usual and it was so painful. Maybe it's babys postition

If I just touch my lower back behind my hips with my fingers its extremely painful there almost like I'm bruised. Think its just got to do with the body getting ready for labour.

Could be the extra weight pulling on your lower back and causing your arch to arch more. I know that is what mine is doing and that hurts like hell. if i make an effort to push my arch straight then the pain goes away.

i can only sit and sleep in certain positons as some times my bump and back hurst way to much. x

Sounds like your LO is getting heavy!