Hello ladies!
I'm on my way here in a few days to 19 weeks! Before becoming pregnant I weight 98lbs at only 5'2.
Now I'm 18 weeks & 3 days today Nov. 15, and I weight 102lbs.
WHATS GOING ON?
I've always had a very fast metabolism & always have had a hard time gaining weigh now at 20 years old. 
Any tips on gaining weight fast or just some similar stories? I'm really concerned that I'm not providing enough energy or fat to my baby.                 
                             
        
Re: Troubles gaining weight
Your doctor will let you know if they're concerned about your weight gain, and will tell you how to fix it.
This has been discussed before, but I'll be nice. If your doctor isn't concerned, you don't need to be. As long as you aren't skipping meals or exercising in an attempt not to gain weight don't worry, your body will do what it needs to do.
In the future, try the search function, people aren't super into this topic to begin with and starting another discussion likely won't go well.
TTC since 2012
Me 35, DH 32 -DH SA all clear
8/97 severe perotinitis infection as a result of ruptured appendix. poss abdomen/tube scarring
1/12 HSG all clear!
2/12 Multiple fibroids diagnosed, 2 submucosal
3/14 Hashimoto diagnosed, began treatment
3/14 first RE appointment
5/14 successful lapriscopic myomectomy via power morcellation
as of 7/14.....not so patiently waiting
poss IUI/IVF fall 2014 BIG Surprise BFP Aug 2014!
I also know a lot of people that didn't gain any until the end of the 3rd trimester. It all depends on your body.