Maybe my Mom Knows Something I Don't Know??

Okay so I'm honestly so crap at taking my birth control recently. And my boyfriend and I have been sexually active recently. and we haven't be using condoms. Horrible. I know. 
I've felt like such shit recently, been peeing A LOT, I've been tired and super nauseous. And I haven't said anything to my mom but on the way home the other day she just out of no where asked me if I was pregnant. 
I'm on cycle day 17. So is it possible that I could be pregnant?? When should I test??