Will my breast implants sag after this second pregnancy? Is it common? (Photos)

I had a breast augmentation in January 2015, 2 years after having my first child, and left feeling deflated. I have been really happy with the results. I am now pregnant with my second child and quietly panicking that my breasts will sag again? Will it happen even more and look worse than first time? Is this something that can happen? I will attach a photo from before I had my breast augmentation and another of my breasts now. Hoping that it may give you a better idea. Thanks