2 days ago i got a tiny scrape on my knuckle from a rusted razor sitting in my home, i never got a tetanus shot for it, i cleaned it right away with soap, water, sprayed it with alcohol and used neosporin, how at risk am i? worried!?

Rusty items themselves do not cause tetanus. The reason why tetanus is associated with rusty things is that rusty things are in dirty places especially outside where the bacteria Clostridium tetani is. This bacterium is mostly found in soil and feces (both animal and human) and in a very dirty house it is found in house dust. I do not think your rusty razor was in any of those places. No worries!