Have you tried the White Widow? How did it work? It is possible the pain is causing the nausea! And pot is the answer.
Indica's are better for sleep at night, may use to avoid problem sleeping. Anti-depressants cause you to sleep and in most case's are also a 'nerve relaxant' for pain control, often, they help for a limited amount of time and then not effective and your Dr. will keep increasing the dose. In my case, I slowly stopped taking them and substituted with Indica at night and more of a sativa in the A.M. for the depression:
Indica strains are better for anti-anxiety: You can't just stop taking the pills, even though they sound ineffective. Just replace them with something that works for you. anti-psychotics: anyone's guess. But, I would suggest you consider different strains for different things during the day. Just my thoughts.
You may consider a few different plants and try several before growin too many. I sampled a lot and found a few I particularly like. But, the results are usually individual. Some types are simply better than others and preferred.

Are you using White Widow now? pr