I have been using both inframammary and peri-areolar incisions for breast enlargement for over 10 years, and have seen no significant difference in incidence of capsular contracture or infections between both approaches.
The areolar approach delivers a superior scar to my opinion, and also...
This would likely take your breast size up by two cups but you should review your decision with your plastic surgeon and be comfortable before you proceed. Breast sizers are an excellent method of assessing an implant volume.
If there is no evidence of injury to your breasts like bruising, pain, swelling then it is very unlikely that your implants are injured. See your plastic surgeon to be sure if you have these symptoms.