mostly I'm disappointed because my rheumy told me I couldn't do yoga anymore since my joints were all too loose.
i still do yoga. i just had to stop doing certain things. i don't do anything that feels like a stretch, anything that puts joints in certain positions, or anything that puts weight on my wrists. which does actually still leave me with enough to do because i'm more focused on breath and trying to be aware of where my body is.
i'm not saying that you should do anything against your doctor's recommendation. i just mention it because my experience has been that lots of doctors assume that the only thing in yoga is extreme stretching and arm balances and so they issue blanket prohibitions even though one of those yoga classes where you lie on cushions and meditate might be totally okay and an awesome idea.
i'm sorry things are rough with meds and such right now. you can pm me too if you ever want to talk or are looking for resources.
i hope you can get some relief from the nausea and dizziness. take care.