Hi there- I'm sorry to hear about your problems. Breast implant surgery is normally very low risk in healthy individuals, but unfortunately (as you understand) it's not a perfect science. I think the 6 month wait between complete healing and re-implantation is more than enough to lower your risk as much as possible.
In other words, there should be no benefit or further lowering of your risk associated with waiting longer than 6 months, as by 6 months, your body has had a lot of time to adequately clear any remaining bacteria (your wound would not have healed in the presence of a significant bacterial load that your immune system did not have under control).
I definitely understand your desire to avoid further problems, but I think your risk is as low as it will get, so go for it!
