Silver is a heavy metal. Heavy metals are poisons and will kill most bacteria indiscriminately. But I wouldn't recommend heavy metal as a thrice daily medicine! It will kill all bacteria and eventually you, as well as poisoning the baby.
Yes! Please do more research before deciding to take colloidal silver. The part about people turning blue is absolutely true. Just because it's natural doesn't mean it is safe.

I've been there 3 times and I understand how awful the sickness is. There are other things you can try (if you haven't already) that have been studied for safety much more thoroughly. Have you looked into restavit?

Big hugs for all you sick mamas!