If you had had a negative IgG combined with a positive swab for HSV 2, that would have proven that this was a new infection – you had virus present in your throat but not enough time had gone by to yet develop antibody. Your doctor was wrong.
Discloing is an interesting question with oral HSV 2. Because it is shed so infrequently, I think transmission is highly unlikely but it probably isn’t zero. I’m just not clear how to advise you on that. I wouldn’t worry about kissing or sharing things, however.
Terri