Yeast infection or normal?

Last night I had unprotected sex with my boyfriend, the morning after, I peed then continued on with my day at work. Afterwards I came home, undressed, and I had a small thick clump of white discharge on my underwear. It was sticky and had a slight odor, but I felt like it was from having the unprotected sex and not showering then continuing my day for almost 8 hrs before coming home. Any thoughts? Maybe just a thick discharge or clot? Or maybe a yeast infection?