Hello DR My mother 73 years old has been sick for going on 8 weks i`ve taken her to her dr several times he did a full panel on her and resuts were low b-12 the rest he said was ok her systems are very shortness of breath wieght loss some nasuia very pale skin her dr says its depression and stress im concered it could be blocked arteries she did have a blood clot from surgery in 2000 any ideas thank you chip