I'm really not sure what you're describing. If you have a saline implant in his leaking the fluid will not be felt on the side of the breast. This saline is not harmful and in short order the breast will flatten making the diagnosis obvious even to you.
If your saline implant is leaking, your breast will become smaller. The new gel implants are not liquid, so cannot leak. Some may form a collection of tissue fluid, a seroma, around the implants in the early stages of healing. Occasionally, this seroma will not dissolve. I would suggest meeting with your surgeon and being checked.