Please help... What do i do?

Well, im 18 years old, and i have 2 weeks until i go to college and im a little depressed about my acne. 2 months ago, i had really really severe acne. I started applying Erythromyicn topical solution in the morning and before bedtime, thus washing my face with Benzoyl Peroxide befoe i apply the topical solution. So over these two months, my skin has got much better, but not to the point where im not an acne sufferer. my acne still shows a lot, especially my scars. I was so confident when i saw these results, but now i still see whiteheads forming, my acne scars have not faded yet, and im about to leave to college. My dermatologist said my skin got better, but he still prescribed Retin A 0.025%. I went to acne. org to see if it is worth using this new topical medication, but i heard way too many complaints about how it causes even more severe acne breakouts and many said that you should'nt be out in the sun when you have it. Im living in a dorm in two weeks and i will be out all the time. What the hell should l do? Should i really take this medication. Has anyone taken it before. Remember, im 18.