Ngayon ko lang po narinig to. Sa pagkakaalam ko kasi pag may discoloration sa tongue lalo na pag purple and blue baka may heart condition or heart trouble? But I am not a medical expert po ah. And since pregnant ka po, it might be one of weird pregnancy symptoms or hormonal changes. The best you can do now is to go to your doctor and have yourself check para sure po tayo what's going on.