I had a vasectomy 9 months ago but my wife thinks she might be pregnant.?

Should have had the follow up. She needs to have a test to make sure. Blood test is the best. If you go to the doctor for a simple urine test, they use the same over the counter ones you can just buy. It is not often but some vasectomies do not take. She probably is not pregnant, her body is just stressed. Good Luck.