Hello, I can see you why you have some concern at this stage.  It's always tricky to assess from photos and a clinical review is best, but there appears to be some hint of a double bubble. However, it has only been 5 weeks since surgery, It may be too early to assess whether it will improve. Did your surgeon attempt to lower your infra-mammary fold during the surgery? Double bubble is usually caused from the implant descending below the tight original infra-mammary fold creating the double bubble appearance.   At the 5 weeks mark, there may still be some swelling that could exaggerate the appearance, it may or may not improve when the swelling subsides. I would suggest to watch it at this stage to see if it will settle in the next month or two. 
Good luckDr Eddie Cheng

Hi Jackattack.
Thank you for posting your question. From the shadow shown on the photograph, I can understand why you may be concerned about the possibility of double bubble formation; however, because it is only 5 weeks after your surgery, I would give it a little more time to see if it persists. One of the common causes of double bubble deformity is excessive lowering of the native inframammary fold. I would suggest that you continue close follow up with your surgeon and let him be aware of any concerns that you may have. 
All the very best.
Dr Ray GohValley Plastic Surgery