Grief leading up to procedure

I had an abortion at 8 weeks for multiple reasons: I had a restraining order against the father for domestic violence, and my doctor had told me that the medication I was taking regularly would interfere with the development of the fetus. I was recently informed that I am a match as a stem cell donor and I’m overwhelmed by the news that my body is able to save someone else’s life but it couldn’t support the life of my baby. I feel like such a failure for being unable to give my baby a healthy life, and by donating I feel like I’m compensating for what I couldn’t do for my baby.