How long could it take for me to get pregnant after I stop using the patch?

Depends. It could take as little as one month or up to a year.
Pregnancy ? If your periods resume on a regular basis, and even if you use an ovulation test to signal the optimum time for conception to occur, your chances are still diminished after 40, and you may require ovulation induction or even IVF to become pregnant. See your OB provider, who may refer you to a reproductive endocrinologist for advice. .