This is best to take it up with your pdoc further, many meds can cause damage to a developing fetus, and can be of risk.
Klonopin is an anti-anxiety med, where Haldol is an anti-psychotic, I do not understand his decision, but then again I do not know you and your pdoc.
He may have taken you off of Klonopin besides what you stated here, because it is an addictive med, pdocs like to limit the period of usage.
I wish you luck with this, I think you posted this in General, I replied with a lengthy repy, then at the same time my computer locked up so I do not know if it ever showed up.
Take care,
DE

In giving advice seek to help, not please your friend
SOLON