I wouldnt worry too much, iv had my urine tested so many times in the past 35 weeks that came up with +++ leukos and protein, doesnt mean much all they do is send it off and if you need a mid stream sample, you get a letter back saying you have 'mixed growth' and can you provide a mid stream sample. I have had this letter round 8 times now, and im still fine, i actually asked coz i was getting pissed off at the letters i was getting, and its coz the tests r so sensitive now that it picks up all vaginal/water bacteria and its completely normal to have some bacteria as that is what keeps things healthy down there, its when the bacteria has an infection is the important one, but those tests cannot distinguish between good n bad bacteria. hence why they do bloods to check white blood cell count as elevations mean you are fighting an infection, extra samples of urine, and blood pressure to diagnose UTI's and pre-eclampisa. your midwife will keep an eye and it is better to be safe than sorry as I did have a water infection at 21 weeks and I was only given a 5 day course of antibiotics, it stopped the burning but i had underlying symptoms still , and my gp didnt follow up and wasnt due a antenatal check until 24/25 weeks so when i showed symptoms to have a water infection it was a little late as my waters ruptured at 26 weeks exactly. so since iv had weekly checks hence why i know so much, im not trying to scare you with what happened with me, but just be persistent when it comes to your care.