I've gained a lot of weight in the short 12 weeks that I've been pregnant. I think a lot of it is due to the fact that I ate only around 1000-1,200 calories before being pregnant. After I found out I stopped counting calories. And I really haven't been eating that great either but its hard to find foods that will stay down. It has been slowly getting better and I have been able to return to eating healthier foods. But so far I've gained about 18lbs..

Sounds like you needed it.
That's the way my pregnancy goes, too. I start gaining from the moment I conceive because I develop an unsatiable appetite that first trimester. I go back to 'normal' after that, but by then, my body's metabolism has changed with the pregnancy, so I just continue to gain.
But, with breastfeeding, it all melts off within the first 8 weeks, so I figure my body knows what it's doing/what it needs in order to survive those demands of early motherhood.

Soooo...had the dreaded weigh in yesterday morning and at 20 weeks, I've gained a total of 11.5 pounds (146pds total). To me, this sounds like A LOT considering I have 20 more weeks to go but my doctor seemed like it was completely normal since I started off at a healthy weight (135). I have been logging my food intake (probably eating less than before) and working out 5-6 days a week so I'm not really sure where all of the weight is coming from. Ultrasound showed that Cruz is only weighing 1 pound right now. Anyone else gained around this amount at 20 weeks? My BF% is fairly low still but for some reason the number on the scale drives me crazy!

I beleive i was up about 12 lbs at 20 weeks and i gained a lot of weight in my 2nd trimester (2 lbs in 1st trimester and 17 lbs in the 2nd trimester) Once i hit my 3rd trimester it slowed down majorly. I maintained for about a month and then am slowly gaining about a half a lb a week. I have been logging my food intake throughout this pregnancy and working out 4-5 days a week.

Starting weight : 165 (height 5'7")

6w : 165 (0)
7w : 165 (0)
8w: 166 (+1)
9w: 166 (+1)
10w: 167 (+2)
11w: 169 (+4)
13w: 171 (+6) <----WTF! Come on! I'm still working out and eating the same lol

Height; 5'9"
Starting: 204.6 (4w) BFP

5w: 204.6 (0)
6w: 206.8 (+2.2)
7w: 205.6 (-1.2)
8w: 204.8 (-.8)
9w: 201.6 ( -3.2)
10w: 202.4 (+0.8)
11w: 202.4 (0)
12w: 200.8 (-1.6)
13w: 198.0 (-2.8)
14w: 201.2 (3.2)
15w: 203.2 (2)
16w: 201.6 (-1.6)
17w: 202.2 (.6)
18w: 199.8 (-2.4)

Total: (-4.8)

Lost again this week. I don't really have an appetite, but I do eat. I'm sure I'll start gaining soon. Congrats to all the ladies who are doing well keeping their weight on track and exercising. I haven't been exercising at all. I really should get my treadmill in a spot that I can use it. Maybe I'll work on that this week.

Er, not. I just went in for an appt today and have actually lost more.

What are your stats? Are you of "average" size? I am overweight and know that losing a few pounds isn't going to be a problem. Are you underweight and still losing? Was your doctor concerned about your loss? I'm well into the 2nd trimester and I am still losing at this point. I would try not to worry too much. If you are eating good, whole foods I think you will be ok. Just don't try to stuff a bunch of junk into your meals to get the extra calories. Maybe try a protein shake if you find that your fluid intake is healthy and it's just the solid foods that are preventing you from getting enough.