Afraid of getting better ?!

I have been struggling with very severe depression and anxiety for the past 4 years and that caused me to redo my third year of medical school and now I am going into 4th year theres no way I can start my clinical rotations with this state of mind so I am starting an antidepressant soon. However, I am scared that once I get better I will start regretting the fact that I was too scared to start them and will realize that I did not have to go through all that hell. How do I get over this ?