Hi I wondering if anyone can give me some advice? I went to my doctor two weeks and about a black line down one of my toenails. She made an urgent referral to dermatology that I went to today and he made an urgent referral for a toenail biopsy. How long does this usually take on the NHS? Also is it sore? I've a two year old and I'm also pregnant. Worried sick and can't help but thinking the worst.