I just had a baby 4 months ago, is experiencing debilitating fatigue normal?

I am 41 and recently just had a baby boy 4 months ago. I also have a 20 month old daughter. Both my children were born by c-section. My problem postpartum has been debilitating fatigue were I feel I just can’t get out of bed and sleep for example for 12 hrs or more. I am not sleep deprived as my husband gets up with the baby. What I find is after one day of going out activity I am bedridden with debilitating fatigue the next day. This fatigue lasts all day and night and I find my upper arms ache. I recently had blood work done and the results are uploaded in an image. Thank you

Medications: Zoloft, Iron