Protein in urine, normal blood pressure

Some protein showed up on my urine test at home. I’m almost 37 weeks and I’ve been doing my check ups at home. I’m an RN with all the equipment needed

Going to call my Drs office in a few minutes but just wondering if anyone knows anything about protein in urine when blood pressure is normal. (It’s always low/normal- ex 104/74) It’s not a high amount of protein and it was my first pee of the day

Thanks