Traces of proteins can appear in urine
normally. However, if the kidney functions are normal, blood pressure
is normal, there’s no swelling of feet/face, the total protein excretion which can be assessed by 24 hr urine is < 1g/day, then there isn’t much to worry. It is known as transient proteinuria and should disappear with time.
I hope that helps. Please do keep me posted. Kind Regards.