Hi Dew,
I'm not sure why your doctor would put you on Tramadol instead of the med you were previously on as I haven't been on Lortab before. I think it's something that you will probably have to speak to your doctor about when you see him next.
I was put on Tramadol just after I was diagnosed with RSD. My Doctor said it can work really well for nerve pain and can help with sleep too. It didn't help for me at all and made me really drowsey (to the point where I couldn't even get out of bed) so after a few weeks, we decided it was best if I came off it. I still get really fatigued now which I guess is a RSD think unfortunately but it isn't as bad as when I was on the Tramadol.
I really hope the new addition helps you and you get the pain relief you need!