Foley catheter during their embryo transfer?

did anyone use a foley catheter during their embryo transfer? I was really scared of using it, so my doctor said that if i could hold my urine, then it was fine. She also told me that I could have infection after using foley catheter .I did not use it. But now I'm not pregnant and i wonder if i should've used it. I ped urine two n a half hours after ET.