TTC after botox.. How long must I wait?

Valerie
So I recently had botox injections to treat the migraines I deal with, one doctor told me to wait a minimum of 3 months before trying to conceive and another dr has told me not to worry, and to continue trying. There's not enough research on it so I am a little worried about the risks and I'm not on any type of bc.  Any suggestions or experience? Btw the injections didn't even help with the migraines, def not doing a second round. I'm almost 38 and don't want to wait much longer. 
Frustrated and impatient ?