Itchy nipples

Mary

I am 12dpo and have really itchy nipples. They are constantly erect and look almost shiny. When I was pregnant last cycle I has really sore boobs around 12-14 dpo and didn't get my bfp until 20dpo ( had a MC at 6 weeks)

Is itchy nipples a positive sign? It seems very random but I've never had it before.