Why would you want to. The process begins in about 4 weeks so, wait. However i don't think you will hurt yourself with false eye lashes in the mean time
Sure you can. It takes 16 weeks to get your optimum lashes so in the mean time it is certainly OK for you to continue to use false eyelashes. Be cautious however to not pull out the growing lashes otherwise you will compromise your Latisse results. I have had a few patients use extensions and just trimmed them as needed as their lashes filled in.