Dropping my pre req class for a w (PLS HELP)

So I’m taking an online class that I need for my pre req. but I’m pretty sure that I won’t be able to get an A or a B, so I’m stressing out and debating if I should drop the class for a w and take it over the summer again, or should I just stick with it and hope for the best that I get a B in the class. This will be my first w if I do drop the class, so idk how bad it will look when I apply for colleges. PLS HELP!!!!!