I have had half blue nails for 2 months now. I feel like I am having trouble breathing, but my abg was normal as well as my oxygen levels. I saw a cardio, who did a cardiac MRI and saw nothing concerning. I cannot find a Dr that will take my blue nails seriously and I am terrified. I am only 25 years old and am a non-smoker recently diagnosed with mild acid reflux. My ears had felt like there is a liquid in them and I have a cough with the feeling of something in my throat. I am very weak (probably because I have not been eating well). My nails are not blue due to Raynauds...have looked it up. It is the bottom half of my nailbed that is purplish/bluish and not the skin of my hands. Please if anyone has any advice?? I have been to many Dr.'s who have just waved my concerns off as anxiety.