Would say that NM potence 200 was too high,or to low, go down to 30, or up to M, if the nausea do not dissapear in 48 houers, go further down or up.
Do not think Nux was rigth as an antidote, it may not have antidoted at all,but only continue the agg, and if taken before the agg from NM has lasted 48 houers, a new agg is produced by Nux v.Antidote NV, and take NM c30, or pref M one dose.
Calcium may fit, but this is from wrong use of NM and Nux.

------------------
Homeopat MNNH Geir E.T. Marcussen
email: getm@eunet.no
http://www.homeopati.no