It really is your decision. What would you feel better about? Dropping this semester and trying again later, or sticking it out and trying for the best? I believe that you can do it though. So maybe you had a bad week. Does winter get to you? I think I have mentioned to you before that I always had lower grades on everything in winter. If that might be the case for you, remember that winter is almost over now. Maybe looking forward to spring will help you. Whatever you decide to do is okay.