Go to the grocery store, buy some Borax Powder (on the laundry aisle). Sprinkle liberally into your carpets and furniture in the morning. Go outside and have some fun for the day. When you get home vacuum it up (you may have to clean your filter with a toothbrush if you have one of the bagless vacuums). Do this once a week for 3 weeks and you will not have any more fleas. They eat the soap, which dehydrates them and kills them. If you have a baby who crawls on the carpets - you may need to find another method.
My former landlord had the house and yard treated multiple times and it still have fleas, we did this treatment the weekend we moved in (we let the powder sit for 3 days since no one was in the house) and saw very few fleas - and they didn't survive very long. It did pretty much ruin the bagless vacuum that my DH bought for the house, but it did get rid of the fleas and was inexpensive. You do NOT want to sprinkle the borax and sleep in the rooms before you vacuum the powder up because breathing in or ingesting great quantities of the powder (a little is fine) can cause problems in some people - dehydration if you are not careful, diarrhea, etc. We sprinkled the powder everywhere in the house and after 3 days there were no more bugs. We continued to sprinkle it in the basement and it killed all of the bugs (crickets, spiders, ants) down there, too.