positive urine leukocytes +3. protein +1

So what's the point in taking urine samples to be tested if they don't bother doing anything? Had my midwife appointment 31st July and it showed I had leukocytes +3. she said it could be contamination so asked me to do one in a few weeks. I did another sample today and it still shows leukocytes +3 and protein +1. but she said nothing other than it's ok. I'm 24+3 weeks. my blood pressure has always been low at 90/60 even during my last pregnancy but now it's 125/85. I know that's still "normal" but it's higher for me and I've had daily headaches since being 8 weeks pregnant. I don't have any symptoms of urine infection. Am I worrying over nothing?