Probably going to dr for splinter removal
It does no good to speculate since you don't know how things will go down. You seem prepared - just stand firm. No matter what she says, just say not thank you. If she persists with the DTaP, you could ask her if she is that concerned about the wound, why she doesn't offer you the TIG since a DTaP at this point would do no good for the currect wound anyway. Post back and let us know how it went. Good Luck!!