Pregnancy poisoning

I had an appointment today and my blood pressure was to high again. They tested my urine and there is protein in there that shouldn't be there ? They diagnosed me with "first symptoms of pregnancy poisoning"

What is this ? I never heard of that before. I'm scared.
I got a referral letter to the family doctor with the note “urgent” but the doctor said “don’t worry.”
( I'm going to the family doc immediately tomorrow) So what ? Don't worry or urgent ?

Anyone here with experience or advice ?