How do i keep my skin clear atleast until prom?

Look for face products that contain either salicylic acid or benzoyl peroxide (clearasil, neutrogena), these are the best most widely available treatments for acne and therefore if you use a face wash or something containing these products will keep spots at bay. Look for good long wearing makeup, vichy dermablend is a good long lasting concealer, they do foundation too, or try mac studio fix, graftobian, whatever you can find where you live. Use a good setting powder to keep your make up in place and then hopefully any touchups that you need to do during the day should be just a quick powder. Good luck