There have been several studies whichy have found no correlation between silicone breast implants and systemic autoimmune disease. Based on these studies it is unlikely that any generalized systemic symptoms that you have, such as a lump in your throat, are caused by silicone left in your tissues.
When silicone breast implant rupture resulting in silicone gel spreading into the tissues does occur, often there is no noticible effect. If signs and symptoms do occur, most commonly the symptoms are localized to the area where the silicone is, and are caused by the formation of a silicone granuloma.
The slicone granuloma is usually a firm, noticeable hard lump of scar tissue that forms around the silicone. If you feel hard lumps on your chest beneath the skin that are tender, then you may have a granuloma.
However, if your skin and breast is smooth, soft and normal, then a granuloma is unlikely.
I suggest that you visit your surgeon for an exam and request a consult with a Rheumatologist.
From your description of your symptoms I doubt that silicone is causing your problem. Scar tissue form your surgery could be causing your discomfort