If you've wormed her with all that, I doubt it... is it just behind the jaw? or is it further down the neck?
If it's just behind the jaw, I'd look at things like Goiter, Lump jaw, and wooden tongue, if it's further down the neck, I'd look at an infection from something like a rose thorn, cut, etc.. I guess it could even be an infection in the esophagus.. but it's really hard to make a diagnosis off of a one-sentence description.. If you can, take her rectal temp, 38C is normal for cows, that will give you a better idea about if it's an infection.
When you talk to the vet, I'll have given you some more possibilities to ask him about, if nothing else. Most likely antibiotic will probably be tetracycline (often called Liquamycin, or LA200 around here)