Pregnancy test

Lauren • I hope you have toilet paper ; because shit is about to get real.
I had just started my birth control and I was on antibiotics I had sex the day I start my antibiotics I was only on birth control for eight days my hormones are absolutely crazy what I be able to test for pregnancy I am on a birth control that allows me  to get my period every other three months could I test today I've been on my birth control for three weeks