I have iron anemia and ai gastritis. i vomited blood 6 weeks ago. my gi ordered a cbc which was normal. could the iron infusion i had 8 months ago skew the cbc results to show no bleeding even if there is? the infusion has helped my cbc and iron #s?

You can have a normal CBC despite a bleed. If you hemoglobin falls from 16 gm to 14 gm, it would still be normal despite the lost of nearly two units of blood.

You have to vomit a significant amount of blood with hemorrhagic gastritis in order to change the Hb. Furthermore, there is a relatively wide range of Hb for a male, 14-18 g/dL. E.g. your Hb before the acute gastritis was 14.8 g/dL with iron treatment and after the hematemesis (vomiting blood) it drops to 14.2, a drop of 0.6 in Hb which is probably significant but you are still not anemic.