Is my nipple too low? Will they change more? (Photos)

Thanks for your inquiry, but without a pre-op picture it is hard to advise.  Please ask your surgeon to comment. 

Thank you for your question. Your plastic surgeon will always be your best resource when it comes to an accurate assessment of your situation, advice, predictions, and/or meaningful reassurance.
Generally speaking, breast implants will "drop" into the pocket that was created during surgery and massaging the implants downward may assist in the dropping of the implants after surgery (for those patients who want to help with the settling of the implants). The rate of breast implant "settling" may depend on factors such as size of breast implant pocket dissected, tightness of the overlying skin/muscle layers, size of breast implant utilized, and concerns such as pre-existing breast asymmetry.
Normally, it takes about 3-6 months (for some patients longer) to see the final result. It is very common for one side to settle faster than the other. 
Although I cannot provide you with meaningful reassurance that you will be pleased with the outcome of surgery, I can assure you that your breasts will change over the course of the next several months. Therefore, time and patience will be your "best friends" going forward.
 
Again, best to follow your plastic surgeon for more specifics. Best wishes for an outcome that you will be pleased with long-term.