Breast discomfort/pain 5 years after surgery

5.5 years ago I had breast implants done and pretty soon after the procedure the left breast bottomed out. This hasn’t caused too many issues over the years, but sometimes it would get uncomfortable if it wasn’t supported. 3.5 weeks ago I started getting pain in my left breast and I’m getting concerned, the breast itself is soft and not uncomfortable, so I don’t think it’s capsular contracture. It feels like it’s underneath the implant, like an ache or throbbing. ECG has been done and no issues.