You are entitled to contribute $2000 to a traditional IRA assuming you each have at least $2000 in earned income. There isn't any upper limit.
If your income turns out to be much more than you expected for the year, so that you are not entitled to contribute to a Roth, the $2000 can be recharacterized to a traditional IRA, which can be with the same custodian where you have your Roth.
Talk to your custodian about how to do this.
Congratulations on your income!
Chris