Help ftm here with a question

Ka

So I am almost 4 weeks postpartum will be 4 weeks on Wednesday. I am having some really bad back pains and not horrible but dull stomach pains. Bleeding has stopped have been feeling fine. Is this normal for pain to stop and start again?!? My back pain is all over and comes and goes. Very achy. Legs hurt just within maybe 3 days. Anyone else dealing with this?!? Should I be concerned