Ouch. I would imagine those edges were pretty loaded with bacteria and it looks like a "puncture wound" so if you haven't had a tetanus booster within 5years, you should see your doctor. (10 years is for routine vaccine; 5 years if there's an injury). Amoxicillin might not cover the bacteria so if it starts to get more painful or red, don't assume you're covered. You might need something a little more broad spectrum.

Hope it heals up no problemo!!!!!!!!