Community medical question

After delivering my baby, I have been facing ongoing health concerns that are worrying me. I am unable to gain weight despite trying to eat properly and take care of my nutrition. My body feels weaker than before, and I do not feel as energetic as I used to. Along with this, my menstrual cycle has become irregular, and my periods are often delayed. This situation has been causing me stress and confusion, as I am unsure whether these changes are normal after childbirth or a sign of an underlying health issue. I am concerned about my hormonal balance and overall postpartum recovery.