pets!!

Okay so right at this moment money is tight I have four pet babies but none are fixed yet. Two cats two dogs, well they all are pretty young still my kittens are about 8 months and I'm pretty sure one is in heat so she's urinating EVERYWHERE my whole house smells like pee and it's driving me crazy I keep cleaning and finding more and it's hard to find all the spots so how can I get rid of the oder I feel gross in my own house....