Discolouration on face

Hi I am 30 years old and suffering discolouration on different sites of face. This all occurred during pregnancy and got worst after delivery.
I have develop dark circles and dark patch on nose nearby eyes. Apart from that I can see darkness around my mouth most prominent on left side. I also developed visible open pores on my cheeks and through the nose bcoz of which I lost my confidence.

Though I carry a very sedentary lifestyle my schedule z pretty busy. As my daughter keeps waking me up 3-4 times nightly. I hardly have good sleep. I am mostly vegetarian, eats more of pulses n cereals n less of fruits and veggies.
No stress apart from my physical appearance.no exercise.not much affected by waeather. But in cold weather skin feels really dry may be be coz of the use of hot water for bath. Pains started in foot and calf by evening. Acute migraine starts when there is change in temp. Either having too cold water n hot food or chng of temp from cold to hot.

Please suggest me something. Help me doc.

Thanks heaps