Yes, I have good and bad days dependent upon the weather but that would not deter me from living here. Florida is one gigantic humidifer and that really bothers my back when mixed with cool weather or the super-hot summer storm weather.
As far as the meds you are on, I am not too sure what they are thinking when treating you with a super heavy dose of valium and then feather dusting with a non-narcotic analgesic (tramadol) and a cox-2 nasid (volteral)
if the pain you have is bad enough for you to take the drastic measure of moving to another country. As far as taking "addictive" meds, diazapam is a very adictive med and it will keep you in a stupor for much of the time. You may want to see about changing doctors so that you can get a more agressive, less sedative treatment regimine.
Maybe prescribe something like one 10mg, valium a day for sleep at night and then maybe use something like some of the controlled release oxycodone meds 10mg, 2 xs a day with the tramadol for breakthrough pain.
If you need a nasid, either stop with the volteral and go to celebrex if cox-2 is necessary but if it is not, motrin 800 would be a much safer method of treatment that has a very good track record.
I am sorry to be negative about the regimine you are on but it just seems like they are leaving you in pain and sedating you instead of treating the pain and helping you sleep at night if you have trouble sleeping. Be wary of taking diazapam (valium) in such strong doses for even longer than 10 days, you will quickly become physically dependant upon them and that can lead to addiction. (yes, dependance and addiction are similar but not the same, long term pain patients become dependant on opioids but addiction is associated with abuse not controlled use)
good luck,
brian