What Causes Low RBC Count Post Hepatitis C Treatment?

I was diagnosed with hep c and I went through the first treat which did not take it was interferon and Pegasus I may be spelling wrong but I injected myself and took pills. My red blood count and ANC dropped during the process and never recovered always was low afterwards. Then I did a new treatment for hep c years later using two pills sAlvolta n some other it s the latest treatment . It took But my ANC and redblood count never has recovered having to take shots of nupigen to boost my counts so I want be at high risk for infection. Why hasn t my system recovered two months later after being off treatment. Even though the treatment took.