Do you recommend redoing the crown or just removing the overhang? (Photo)

i had this crown for over two months it was very plaue retentive and soon i had pain in bitting and throbing continuous pain couldnt sleep at night my cheeks where acking i removed the crown my dentist told me it needs simple adjacements but am not so sure it can solve all the problems, pls my dentist told me i had periodontal pocket..what do you suggest