Today I am 129 lbs, I started at 122 (5'5) and am only 13 wks 1 day pregnant. Baby is measuring ahead by a week, but I feel like I am gaining pretty fast. Last time I did gain 5 lbs in the first tri with my daughter but overall only 28lbs. I just feel like this time Im gaining more quickly. I am not eating anything crazy either the same-(greek yogurt, salads, soups, the occasional pita chips and hummus, and at night if I want dessert low fat ice cream) You get the idea. No, I am NOT working out, maybe that will help when the weather gets nicer too and I can walk around. I just dont know whats up this time!  ( plus I feel its a lot of gain in my butt and thighs! EEK!) Advice?  Ill try and post a pic later of the bump!  Anyone w/instructions on how to post a pic?
 Anyone w/instructions on how to post a pic?
Re: Advice-weight gain
Honestly, there is no rhyme or reason. Your body gains what it needs and 5 lbs is nothing at 13 weeks. You could be retaining lots of water.... what time are you weighing yourself?
Maybe you are having a boy!
I have the opposite going on right now, I started at 128 and am 133 and am 17 weeks. This pregnancy is totally different. With my DD I started at 134 and gained 42 lbs. Things were totally different, I was eating way too much and not exercising at all. This time I have a toddler running around, am eating better but still enjoying a nice large brownie with frozen yogurt more than I probably should and just going with it! It will all come off again...(wishful thinking) 
 
You are fine, will be fine and doing a great job!!
Here is the bump! ( it goes out the back too! LOL!)