If you're breastfeeding you can take prenatal vitamins both for you and the baby. If not you can just take calcium tablets. I drink the milk for mommy too (Nestle Mom & Me). I'm still aching a lot too though, probably has to do with carrying baby so no choice 😔. Maybe try a deep tissue / postnatal massage?
Any calcium supplement should be fine. Also increase your intake of foods high in calcium, like yoghurt and small fish (with bones).
You can actually continue with your prenatal tablets