Hay, I feel you, those first few days after delivery are so overwhelming na, and adding pumping into the mix can be tough talaga! A few of us moms noticed na the positioning while pumping (if you're hunching over or tensing up) plus dehydration and exhaustion from lack of sleep postpartum can really trigger headaches and neck pain, kaya importante mag-hydrate ng marami at try to pump in a comfortable position na hindi ka nag-huhunch. But honestly, tatlo lang days postpartum ka pa so if it's persistent, better check with your doctor or OB just to make sure, especially since you're still healing, baka part din ng postpartum adjustment and they can give you better advice on how to manage it habang pumping pa lang.