5'2, 130lbs, 425cc moderate, do I have symmastia? (Photos)

MariaRA,
You do NOT have synmastia. You have a beautiful result. Enjoy it. Good luck!!!!!!!!!!!!!

I don’t think you have synmastia. It doesn’t look like the skin is being tented on your medial sternum.
To make a quality assessment regarding the outcome of any plastic surgery procedure we generally need to see a complete set of proper before and after pictures.
Based on what pictures you’ve posted your breast have natural divergence.
Rather than putting the implants centered on each nipple axis, your surgeon placed the implants in a more desirable medial anatomic position.
This means you have more volume on the medial aspect of the breast than the lateral aspect.
Had your surgeon placed the implants more laterally than your divergence would’ve been amplified.
The implants are also a bit on the wide side and whenever patients choose larger implants, the chance of having undesirable side effects, complications and need for revision surgery will always go up. You could ask your provider to open the pocket laterally, but then the implant is going to end up closer to your armpit.
The implant has to go somewhere and whenever you choose an implant that is larger than your natural breast diameter the surgeon has decide where the extra volume is going to be placed.
To get a quality assessment, consider reposting with proper before and after pictures.
If you don’t have before, and after pictures then ask your surgeon to forward the pictures they took.
It would have been easier to balance your outcome with smaller implants. I think had your surgeon put the implants lined up on your natural nipple axis you might then not have like how the breast sit laterally “breast in the armpit look”
To give you an assessment, if your implants should be moved, we need to see quality pictures of the lateral aspect of your breast.
Best,
Matt Hagstrom MD