Will having sex the night before my pap smear affect the results one way or another?

No. Absolutely not. PAP testing is a scraping of the outer mouth of the cervix to test for pre-cancerous and cancerous cells, and for Genetic analysis of the presence of papillomavirus infection in your past. A prior infection puts you at increased risk of cervical cancer.
Maybe. Use a condom to reduce vaginal fluid, and there could be irritation of the cervix or vagina. The pap is usually not adversely affected.
NO. Having sex the night before your pap smear should not affect the results.