Extreme Muscle pain in back

Since leaving the hospital a couple of weeks ago (and since the change of pain medication), I've been suffering with a really painful back (yet again). It is on the right hand side and appears to be muscle pain which I think is made worse when I drive, especially changing gears. I have tried to avoid driving for the last week or two because of the pain in my back but there are times when this is difficult and needs must.

The pain has reached unbearable heights in the last few days and I just don't know what to do. The pain medication I'm currently taking is helping with any bone pain but it is not touching the muscle pain in my back. I suppose the pain level is slightly better in the late afternoon but once I've slept I can barely move in bed. I worried Ellie and Freddie this morning because I asked Ellie to help me get up out of bed and I screamed out in pain and started crying. Freddie said he felt sick last night and this morning and it would be so easy to let him stay off school but fortunately Annie was picking him up for me. It's not fair on the kids to see me suffering like this as it really does upset them. I'm not sure what to do about it at the moment but I'm seeing the District Nurse this morning as usual for my dressing change on my armpit which seems to be healing very slowly but going in the right direction. I've also got to speak with Sue Ryder this morning about arranging transport for tomorrow so hopefully I'll get some attention to the pain.