Pregnant? Yeast Infection ?

This post is probably going to be all over the place but 🤷🏾‍♂️, okay so I’m on birth control and i had unprotected sex 3 weeks ago. And two days ago i switched soap and shortly after my shower my vagina started itching intensely, i just started the Monistat 3 tonight but I’m just worried. Also my period ended on Thursday, i haven’t had any weird discharge or anything my only symptom is the itching.