Help meeee

So i took plan B after having sex (with a condom, took plan b because I panicked) the 17th of December. Haven’t had sex since. I had a weird “period” that really only came when going to the bathroom but it was heavy and a lot when it did. It lasted 6 days. Now I would be around my ovulation time. And i have this... i tested this morning and had a negative test.