Go to your doctor or pharmacist and tell them that you aren’t sure. They’ll probably just recommend getting a booster. I got all my childhood vaccines (except chickenpox because it wasn’t required when I was a kid) and my doctor still recommended a booster just to be sure.
As an aside, you should be sure to get your tetanus booster every ten years as well.
Go to your doctor or pharmacist and tell them that you aren’t sure. They’ll probably just recommend getting a booster. I got all my childhood vaccines (except chickenpox because it wasn’t required when I was a kid) and my doctor still recommended a booster just to be sure.
As an aside, you should be sure to get your tetanus booster every ten years as well.