Nose bleed : early sign of pregnancy?

So I caved this morning and took a pregnancy test at 12 dpo. It was BFN of course. I went to the dentist this morning and had a random nose bleed this morning. I can't remember the last time I had one. Then my dentist asks me if I'm pregnant. She said she had nose bleeds when she was pregnant with all 3 kids. Anyone else hear of this? I hope it's real. I live in Florida so it's not dry or cold right now.