Bacteria in urine sample but no UTI symptoms?

Should I be worried? My doctor said it's less than 10 000 units so it's not considered a UTI and treatment isn't necessary unless I develop symptoms. But I have read you can have a UTI without symptoms and that UTI's while pregnant can be dangerous and I'm panicking now.

Ahould I press my doctor to get antibiotics even if the amount lf bacteria wasn't enough to be considered an infection? Won't it be better to treat it BEFORE I get symptoms?