First of all, you should NEVER cycle a tank with live animals. That is cruel and completely unnecessary. It's basically torture, and if you care about your pets, you wouldn't put them through that. Secondly, how much live rock is in your tank? Uncured live rock can smell really bad, bad enough to stink up an entire house pretty much. If you pick up each piece of live rock and smell it, you will know right away if it isn't cured. This would also mean your tank isn't finished cycling. Die off on the rock will be releasing ammonia into the water constantly. To answer your question about adding more fish - definitely not right now, you shouldn't have any animals in there to begin with. Plus, 10 gallons is tiny, so other than a small goby, you don't have very many options. The damsel you have in there now is probably going to be very territorial and aggressive to any newcomers, especially if it's already stressed and suffering from a cycling tank.