Urine infection

Hi mummies, I was told by my gynae 3 weeks back that my urine has slight bacterial growth and there isn't a need to treat as I do not have any symptoms. But this morning, I went to the GP for abdominal pain. GP did urine test for me and was told I am having urine infection which I assumed was the untreated infection. He prescribed me with amoxicillin antibiotic which he mentioned is the safest for pregnancy. My questions; 1. Should I listen to my gynae? Or 2. Should I just continue taking the antibiotic given by the GP?