Yes, it is important to be able to contact the vet as soon as possible.

When questioned about the pesticide/herbicide possibility of causing bladder cancer, my vet said that cancer can strike at any time. Each time a cell splits, there is a possibility for a mutation...it can happen as simply as that. So he said that cancer can strike at any time for no apparent cause, to any animal.

It sounds like Tessa is doing fine, so hang in there, Tessa!! I hope you have many good healthy months ahead of you. You will be in my prayers for that!!!