When will my boobs look normal? 4 days post-op. (photos)

You are still very early in your healing process and your swelling will not resolve for several weeks. Patients will experience some bruising and swelling, a feeling of tightness in your chest, and possibly some changes in nipple sensation. All of this will get better and gradually resolve over time.  Your breasts will start to settle and your shape will also evolve within a few months. I suggest following the post-operative instructions your board certified plastic surgeon has provided and follow-up appointments when necessary. Good luck on your road to recovery! 

At only 4 days post operative you are very early in the stages of healing. Swelling will continue to settle along with your implants. Continue to follow up with your chosen surgeon. Regards, 

Thanks for your question Aimee.
Your question is very common for a patient who has undergone a breast augmentation, so please don't fret!! It is very typical for breast to swell, become asymmetric, and look very unusual in the first few weeks after breast augmentation surgery. The 'gap' is not necessarily how the breasts will look after the procedure, and as your skin and soft tissues relax, stretch and accommodate the implant, the 'gap' will change. 
It can take several weeks, to months before your you start to see the final result, due to the soft tissues changes that are occurring. 
Because every person heals at a different pace, and the swelling can be quite variable, the time frame as variable.
At this stage, you look exactly as you should, and this should continue to improve over the next little while
You should seek out your surgeon if anything comes up that you are unsure about.
Good luck with your journey!

Hi and welcome to our forum!
As you are only 4 days postop, it is far, far too early to assess your final shape / size. Swelling masks the result. Tight muscles and tight skin compress the implants. As the swelling subsides and the tissues stretch, there will be a significant change in shape and size. 
Be patient. If concerned, discuss the issue with your surgeon.
Best wishes!