My younger sister is wanting to get lash extentions done.
As with any product there are potential health risks involved, but seeing as how you have already gotten them done, I would say you are in the clear.
The risks would be associated with the application process as opposed to wearing them. (Unless one was to come off and get into your eye, like any eyelash. Then you may have red or irritated eyes, watery eyes, and the chance of scratching the lense of your eye. But that is a risk with your natural lashes as well)
I would love to see some before and after pics if you have them.