I took a clonzepam around 16 hrs before i had unprotected sex. could i have hurt the egg if it forms? it's .5mg in dose. i took it up to 3x a week, no more than 2x a week. going to stop taking since i want to concieve-i'm more anxious that i took it?

The risk is there because half-life of clonazepam is typically 30 to 40 hours. Yes, you should stop it if you want to be pregnant. However, I wish you are not conceived now. There is a pregnancy exposure registry that monitors outcomes in pregnant patients exposed to clonazepam; information about the registry can be obtained at http://www.aedpregnancyregistry.org or by calling 1-888-233-2334.

For the first 5 days after fertilization the conceptus is not implanted and does not absorb from maternal blood. So the risk would be low, if last dose was pre-conception. In general would avoid benzodiazepines during pregnancy, if possible depending on severity of need Speak to your provider &Ob https://mothertobaby.org/fact-sheets/clonazepam/ https://www.aafp.org/afp/2008/0915/p772.html