The Please Help Me. I Am Very Very Worried. I

The Please help me. I am very very worried. I am 30weeks pregnant and had 3 tetanus vaccines. I have 2 ob-gyne. My private ob gave me 2 tetanus vaccines, 1st in August and the 2nd was last October. Now, (27-12-15) my public ob-gyne gave me my 3rd vaccine, even though I told him that I had already 2shots of it. He said that was booster. Now I am very confused, If my public ob-Hume was wrong, is it have a harmful effects on my baby? Is it still safe?Please, I'm begging, answer me.