High Evil, I'm sorry you're going through all of this. Obviously we'll help you out.
Strain wise, White Widow can be a picky beeotch at times. Now I'm talking about the original White Widow. The genetics have been watered down a bit since WW won the cup. So this one may be a bit easier. You might try that Jock Horor for your next seed you pop. She's Nirvana's copy of Jack Herer - basically. She'll be one of the easiest strains you grow. here's a little background on the strain:
http://en.seedfinder.eu/strain-info/Jock_Horror/Nirvana_Seeds/
compare that to this:
http://en.seedfinder.eu/strain-info/Jack_Herer/Sensi_Seeds/ - the real Jack Herer.
great genetics can mean the difference in growing ok medicine and medicine that does what you need it to do. There's lots of great stuff in the store on this site too.
I would think you'd want a nice indica dominant girl, though, for your pain and nausea.
so what about lights? T5's would do you fine in veg. You can get great cheap T5 bulbs too. What are you thinking about for flower? sorry if I missed it if you posted it earlier?
In what medium will you grow? What nutrients? what lights for flower?