Ummm... which antibiotics? They aren't all the same.
How long is your TT? They aren't all the same either!
Do your antibiotics need to be taken on an empty stomach?
When is your TT in relation to your dosage timing?
I'd reckon most should be OK.
There again advice on the internet is a bit dodgy...
By the way, hope your abscess resolves soon and good luck with the TT if you do it.
It's probably unwise to race with ongoing unresolved infection anywhere...