I once came to a high school counselor really upset because I had received a high B in my AP Calculus class for the first semester (it was a two semester long course). I told her how upset I was because I thought I'd fail if I had to take another semester (this was my first B ever in a math course), she agreed with me that I would probably fail and recommended I drop the class.
I wish she would have reassured me that I would have been fine. I had to take calculus again a couple years later for my degree because I didn't get credit for it back in high school since I dropped the course.
When i was 19 and had recently become a Christian i met a girl, began dating her and likewise over time came to love her. Because i was sleeping with her the Christian(s) that had influenced my thinking to the point of conversion all advised me "get out of the relationship" as a matter of prioritizing my spiritual life...
Brush your teeth and everything else will take care of itself.