Weight/pregnancy

So I'm starting to feel like complete shit about myself. I've never been this weight my whole life until I was about 6-9months pregnant with my other kids and now I'm starting off at that weight this pregnancy. (I'm 5"6' and 170) Before my first kid I was 112lbs. Before my second kid I was 140lbs. I'm scared to death to gain more weight. I feel so large. My Obgyn nurse said i fall into the "obese" category and told me I could only gain 11-15 lbs this pregnancy! I didn't feel as though I was that big!! Made me feel like crap and it's been weighing on my mind for the last almost four weeks. Idk what I want out of this post. I guess I'm just venting and looking to see if anyone else is my size and how y'all are feeling about it. Thanks for reading my post