Are my breasts too low down my body now? (photos)

You are still early in the healing process and what you are seeing may not be your final results yet. You are still undergoing significant changes and persistent swelling and tissue tightness may still be temporarily altering the final appearance of the procedure. Usually, it takes around 6 months to fully heal and only by then will you be able to see your final results. Based on the photo, your implants do not seem to have fallen lower than the breast crease, which means they are still relatively in good position at this point in time.

Your implants appear to have been placed directly under your breast tissue, this is the correct position for them.  Your breasts are still quite puffy & swollen & whilst the swelling will subside, I doubt that they will "drop" lower on your body.  A round implant above the muscle will always have a slightly less natural appearance than a teardrop implant under the muscle, but since you had quite a reasonable amount of breast tissue to begin with, I believe that your result will be excellent...& "natural".  Have patience & continue to follow up with your surgeon.