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AS exam help

Hi, I got my AS results today. I got a B in psychology, C in chemistry, C in business and D in biology. I am 1 mark off an. A in psychology so I'm getting them remarked and was wondering if I should retake chemistry and business to get Bs and hopefully get into a better uni. I enjoy biology more than chemistry but I'm not sure whether I should drop it or not. Im not looking forward to study chemistry if I do take it because my friends in the year above said it's really hard in A2. I'm also not too sure what degree I can do and was looking for advice for anyone who has done a psychology degree or who has taken theses subjects. Thank you