Im thinking about a field in phlebotomy but im not sure?

Make sure you go to a good school rather than some like through the mail course. As an army combat medic we have to do ALOT of invasive proceedures and blood draw stuff so during our schooling we went through the licensing. It wasn't horrible, but it was a little bit of work. Just make sure its what you want to do and that you can stand the site of blood. Don't be squimish..