Smelly cat butt!!!! help?

Hi. As soon as I get my next paycheck I'm taking my cat to the groomers... I just got a new cat, and the vet says its irritated because of her biting and licking, cause of tapeworm. Her behind looks nasty. It looks infected or something and the vet didn't give me anything for her butt, just the worms. I want to pet and love my cat and this is sooo much within the first week of having her..but the smell honestly makes me want to vomit just her walking by me. I can't have her on the furniture. Her poop and pee clings to her inflamed behind. Is there any unknown thing I can do besides wait for the groomers? Again, the vet didn't seem alarmed about her inflamed butt.