low blood sugar?

Is this common postpartum? I had our baby girl almost 4 months ago, I'm EBF and I feel like I've been having low blood sugar issues. Weakness, lightheaded, fatigue, intense hunger, sometimes cold, sometimes hot flashes.. Not constantly but a few times a week. I do have trouble eating well during the week and skip meals here and there (my baby has to be held 24/7 - hard to find time) and I'm incredibly sleep deprived 😞