I've been having pains all day down in my lower back. I'm not sure if I should call the doctor or not but wil wait to see if they get worse or go away. Maybe a sign??

Considering you are having twins and are on bedrest b/c of pre-eclampsia, I would call and let the dr know. Even if it is 'nothing', better to call for nothing and be on the safe side.

It could just be one of the babies has her back to yours, giving you back pain. Or just your joints seperating some. Could also be from laying/sitting so much while on bedrest.

Hope it's nothing but a nuisance!