In article , susan_r23666
@yahoo.com says...

A tomato hornworm can take a branch off of a medium sized tomato plant
overnight. Several worms and fairly small plants overnight would be
long enough.

The OP seems to be in Canada and I doubt that his plants have been in
the ground 2 months.

It all depends on where you are.

Our tomatoes have been in since early June... which is about two months.
(London Ontario Canada)

Canada has a variety of climates, east to west and north to south...