OMG....we have fleas too!! We do have a dog, but its only been the last week they've decided they're going to take over!
We have a flea bomb, but I'm holding onto it for now. They aren't infesting inside just yet. We had a couple of days of them in the loungeroom, but haven't had any in the last 2 or 3 days.
I washed the dog a few days ago, then tipped a mixture of water & tea tree oil over her & left it to dry. My mum uses tea tree for fleas on her dogs, so I'm guessing it'll work. I also sprayed some around the loungeroom floor a few times & as I said, haven't seen them in a few days.

DH bought some ant, flea & tick sand stuff for outside. We'll spread that, then maybe bomb inside after if we need to. Its ticks & fleas we have. Ants aren't so bad... yet!