I'm not totally sure what it means, you can find stuff out about protein in uring on https://www.babycentre.co.uk/pregnancy/complications/proteinurine/
If you're not sure what it means tho, maybe give your midwife a ring & ask her more about it.
& as for the rhesus status, I found this website helpful, https://www.babycentre.co.uk/pregnancy/complications/whatisrhesusstatus/ I'm negative too, it just means that you'll have injection(s) later on in pregnancy, it's really quite common.
Joanne xx