A psychiatrist might prescribe medication of the fluoxetine (prozac) type.
2. A psychologist might use psychological treatment to desensitise you to the sight of blood.
Each has advantages and disadvantages. A medication trial might be effective only for as long as you stay on the medicine, and you have a long life ahead of you. Of course, medication might work and the phobia might not recur if you try going off the medication in 8-12 months. Psychological treatment might take months of weekly effort.