You've gotten some good info here and here's something else to assist:
You already know you can't lose your TD status since your husband is on a TN.
When you're applying for your TN, remember you are eager to contribute to the US economy legally since you're already in the U.S. Also, when your husband's TN completes you can then make a decision as to your options (move back to Canada, stay in the U.S.).
There are many ways to look at a situation, you just have to convey the situation so it works for you and you can show it to the officer.
Finally, no one knows what the future holds - create it as you wish for the current moment.
Some border tips:
- Answer only the questions that are asked and don't try to explain anything additional.
- Answer as briefly as you can
- Don't chit chat (many people put their foot in their mouth and get denied)
- Smile and just listen to the officer
Read the article on
Common TN Visa Mistakes to Avoid to help you prepare for the border.