Possibility of pregnancy???

Hi! So my period was due March 25th... It didn’t come but then i had sex with both a condom and the pull out method on April 2nd. And i have yet to get my period yet. So as of yesterday i an 3 weeks late for my period and 2 weeks post sex. Do you guys think I’m just having an off month (this does happen sometimes) or do you guys think I have something to worry about?

Adding to That, when you you think is the right time to take a test? Normally you wait a week or two post period due date but since i actually had sex after my period was due... it’s throwing me off lol!

Any help is very appreciated!!