I know someone who has been getting the lash extensions professionally applied every month for over a year with no problems. I, too am surprised they sell it in packages for home use.
Talika makes a great lash conditioner called Lipocils. Here are reviews of makeupalley.com ...you might need a (free) membership to see.
http://www.makeupalley.com/product/s...reatments_(Eye)
Sorry that happened to you! I hope they grow back quickly.