I was wondering if anyone had any tips; the last two nights I have been up 4/5 times in the night with a sore bump and very sore aching back. this happens whatever position and pillow combinations I try. Our mattress is firm too. When I finally give up and get up my back and bump are very achey indeed, which seems to wear off after about an hour or so of being upright. I would be grateful for any advice.