Hello and thank you for posting photos along with your question. First and foremost I think it is important to be seen by your plastic surgeon. Make it very clear to the nurse that you would like to see the plastic surgeon. Even though you have posted some very helpful photos, it is difficult to determine exactly what is going on without a physical exam. However, the flat indentation could be due to the implant itself, but then again I don't know what type of implant was used. If you look at some implant types while they are laying flat on the table, you will notice a dip at the very apex. This maybe what you are seeing when you lay flat.