i had silicone breast implants placed above the muscle on may 21 with out any complications. now i am having a small, semi-hard lump on the right breast by my cleavage which is also creating a flat like spot next to it. when i press on the lump, it feels like an air bubble. i can pinch the lump, it feels like a piece of soft, folded plastic. any idea what this could be? i have an appt. with my plastic surgeon tomorrow. thank you.