Celeste had her four month appointment today. We didn't get very good news, found out today that she lost so much weight and now she is in the 3rd percentile. Her doctor said it's because she is just so small for being a 4 month old, he prescribed us a formula that will help her gain weight, but I'm so worried that in a month when he reweighs her she will still be dropping we have tried everything to help her gain weight but nothing has worked. Also found out she might have something called gastroesophageal reflux disease (GERD). It's just been a hectic day. I feel like it's my fault and I haven't been doing much for her. has anyone dealt with this before? I would really like some advice.