Advice? Please! FTM

I went in for my 21week check up on Friday and the doctor said there was protein and traces of blood in my urine. She didn’t seem concerned and when I asked if everything looked okay with my baby boy she said everything looked perfect. She did request for me to take another urine sample and so far I haven’t heard anything back. I’m not bleeding and when I wipe or go pee TMI I don’t notice any blood. I’m feeling baby move like normal. She did mention I was a little dehydrated and she’s mentioned this before at my past 2 apts. Has anyone had this happen before? Could it be something I shouldn’t be worried about? I could really use some advice, thank you ladies! x