My Specialist has given me Diazepam 5mg to take 3 times a day for 3 days then after that take as required for severe muscle spasms in the lower back, i've take 2 tablets today and they have not touched the pain, He said they will knock me and will affect my ability to concentrate ect, but honestly it feels like i've take 1 panadol, in im excrusiating pain and can not sleep, i don't know what to do?