As far as I know I was never immunized for tetanus as a child. About 5 years ago when I was 19 I got in a car crash and got a single tetanus shot, I dont know what kind, I was unconscious for several hours and dont remember what the paperwork said. Fast forward until just about a month ago I was in a chicken coup and hit my head on a nail that was sticking out of the ceiling - it was relatively clean and rust free nail, but still, in a chicken coup - So I cleaning it out with hydrogen peroxide and went and got another shot within 24 hours of the unjury, I think it was a Tdap, but not sure, I told urgent care what happened and they gave me something. Now current date (just about exactly a month later) I have a sore red bump on my head that I believe has been there like two days.I forgot where the wound was, could be a really deep pimple I guess, but it doesn't really feel like one.
So I see three scenarios:
1: I'm over-reacting as I've been known to do and am fine.
2: Since I never got a series of shots one after another I'm not immune and I'm about to go through horrible agony over the next few months and maybe die (I know, I'm being dramatic)
3: Since I got a couple shots but they weren't in a series I'll still get tetanus, but it wont be as bad cus' they'll kinda help.
So, is my thinking somewhat accurate or am I totally wrong? There's only so much one can get from google and I'd love to understand tetanus better.
Also, should I got and get another shot or would it not make any difference at this point?