Sleep Problems!!!

After Baby delivery through ceserean & bany on formula milk..... I tottally experienced sleep disturbances lot... Even my mother in law was not allowing me to sleep properly.... Now I am feeling always tired, no concentration at all. Feels dizziness, feels short tempered, Memory problems, etc...... I have become very weak.... Always tired in both body & mind...... Plz help...how to solve these? And Which doctor to consult about these,??