Implants are too large. Am I overreacting? I’m 3 months post op and regretting surgery. (Photos)

It’s
still early in the recovery process and implants can take up to six months to
fully drop into the pocket and soften. It’s important that you are following
your surgeon’s post-operative care instructions to ensure the best results. We
recommend scheduling a follow up appointment with your surgeon to further
discuss your concerns

If you felt happy with a 330 cc and got 450 cc, that's a significant size discrepancy.   Now you know that 450 is larger than you want.  So it would make sense to go down at least 100 cc and perhaps a little more.   I think 3 months is enough time to know you want smaller implants and consider the exchange.  They do look a bit large for your frame and the breast skin envelope looks tight to me.  I am sure your surgeon will be happy to work with you to revise.