muminalice - it will probably get worse but maybe not. Most people find that it does but sometimes the position of the baby and its increased weight can actually work to stabilise the pelvis. Make sure the pillow is between your knees. If you're not already doing so, it's important to ice your pelvis. I ice throughout the day and go to bed with a pack between my legs. DD now sometimes insists on taking an ice pack to bed with her I've found ice is THE best thing to keep the pain under control.

As far as getting in and out of bed is concerned, I haven't mastered it either. The key is to keep your knees together but I'm particularly unco and can't quite work out how to do that. I agree, those few minutes where you don't know if you can actually stand up and walk are the worst part of the day.