yea I am in the states, ill probably retake it later on, I just want to focus on my sciences for now, since I took care of a majority of my non science and math courses, the only thing I have left are my higher level science courses and that's it.2. Depends on the school's policy. Some will take the higher grade. Some may also just look at the first attempt. You could take other courses to boost up your GPA.
Are you in the states? It may be different there vs. other countries.