W grade?

Hello everyone, I’m currently a senior and I’ve been accepted to the U this fall. Right now, I am taking two CIS classes (College In The School) at my high school, first one is CIS Chinese, and the other is CIS Anatomy. If you guys don’t know how these course work, basically they average out the grades we receive in high school, and the grades are automatically on our UMN official transcript.
The only issue right now is that I’m not doing very well in Anatomy; I’m so stressed out because my senior year load is beyond crazy and it’s my hardest year in all of high school. I want to drop that class, but since it’s so late, I’d receive a “W” grade on my transcript. I was wondering if any of you know how bad a “W” grade is? If I plan to go to graduate/medical school in the distant future, how bad would this grade look?