Hi there ~
I understand your concerns. Dizziness
noise and not in control of your movement or incoordination; among other things, are all symptoms of marijuana abuse
. I do believe there is cause for worry as some people do not tolerate even small amounts of substances of abuse. I believe your girlfriend is among them and it might be best to avoid the marijuana entirely. I hope you visit with a doctor to find medications that might be helpful symptomatically while she detoxes from the marijuana.
I hope this helps. Take care and have a lovely day!