Hi feelingundone,
Very much thankful for your reply! Relieved to hear that the risk is low. Sorry, i am just too anxious about this.
To add on, Today i just spotted a few white ulcers at the middle - back of the throat. is this normal?
This is a very low risk for hsv. Saliva is not an efficient way to transmit hsv. I wouldn't be concerned.
You can rest easy as you didn't get hsv from this.
That person mouth has no visible sores or blister externally on his mouth