How can I get over my fear of injections and blood tests without actually having to have one?

By therapy? But u have to remember blood test is important to identify certain diseases before causing u serious medical condition, in addiction many medication u may take may need certain blood level to work and above certain blood level may become toxic, therefore blood level is very important.
Fear of blood. It is not unusual to have fears of injections and blood tests etc. Discuss this fear with your family and your doctor. Humans have a built in fear of seeing their own blood as it is a survival mechanism. Try not to focus to much energy on fear, and more focus on courage and well being.