Talk to Gynecologist on Weakness And Body Pain

Salam, I'm bf mother of 4 months old baby, after c section my weight was 56kg now in 4 months im 49 kg. I'm loosing weight gradually, I'm feeling so low all day, so k uthny pr ya ek dum khry hony pr feet mein bht pain hota hy even mere feet meri body ka weight bardasht krne k qabil bhi hoty, face or body bht weak hogyi hy, thora sa kaam krun tiredness feel hoti hy, currently I'm taking OMC-D calcium supplements, please suggest me multivitamins or yeh bhi btayn k kitny time tk khani hein, omc-d mein 1 month se ly rhi hun. Please mein bht preshan hun, mujhy baby k sath life routine k house chores bhi krny hoty hein jo k mein nai kr pati .