planning to parent alone

After losing yet another baby in November I have decided to go through a donor and have/ raise a child alone.  Do you guys think it's crazy to plan a pregnancy to do it alone? I'm already a single mom (her dad helps me) to a 7 year old but I don't want to wait any more.  I'm finally done with my daughter's asshole of a father which was also the father to the child I lost in November.