12 weeks and gained 15 pounds...?

Kelsey • 23, soon to be mommy of 2 boys

I am now 12 weeks pregnant and before my pregnancy I was 115 pounds at 5’5 and very very skinny. To the point where my family and friends thought i looked sick. As of Monday I was 130 pounds. My doctor has cautioned me about gaining weight so quickly but did not understand that before my pregnancy I wasn’t nourished properly. Do you think that this is my body trying to get healthy for the baby? I’m not over eating or eating bad foods... before pregnancy I would eat very little and now I am eating as I should. Advise/suggestions appreciated greatly!!!