What to do if I have many acne medications, which one do I use?

The one that works. If you have topical benzoyl peroxide, use as tolerated. Otherwise salicylic acid and/or retinoic acid derivatives. Throw the others away unless they were prescribed. If you're not clear in two weeks, phone your physician. Acne can be managed but not cured until it self-cures with time. If you are not clear in two weeks, get with your physician who CAN clear you. Best wishes.