Is it possible to move my nipples more central? (Photo)

An honest assessment to your posted issue is NOT without increased visible scarring. I would leave alone in this case... 

There is a relatively wide range of normal in how closely positioned the nipples are in patients who have never had surgery. In that case the nipples can be moved more centrally at the expense of incisions (scars) either completely around the areola or the medial half. Only modest changes in nipple position are possible.  The position of the implants make a big difference.  In your case, your implants may not be centered behind your nipples and breast mounds. If they are placed medially in an attempt to give cleavage, then they will displace the nipples laterally. Preoperative pictures would be necessary to evaluate that.  Larger implants or adjustment of the position of their placement could be done with revisional surgery, but at the price of much more "side boob" which you may not want.  I would discuss your options with your surgeon and give things time to settle down.

Nipples tend to point in a direction perpendicular to the chest wall. So yours are in a normal position for the procedure you had based on your anatomy and chest wall. Now it is possible to move them more medial once the swelling has gone down. But I would not recommend this as the risk of more prominent scaring and distortion or the nipple itself would be high. You would most likely regret doing anything after you see the results and wish you had done nothing but by that time the damage would have been done. So my advice is to leave them where they are.