Moms with toddlers

My son is 2.5 and about 25 pounds. I’ve noticed that every time I pick him up and walk my stomach hurts and feels like I’ve pulled a muscle 😔. I feel so weak and sad. I used to go walking around the malls and stores a few times a week with my husband and son to just get out of the house and it’s been about 7 months that it’s been miserable to do so. A 30 minute target trip leaves me crampy and unable to move.

Any other second time moms feel the same way? I can’t even carry my baby and I’m only 33 weeks.