Stressed out about eating

My daughter is 1 years old. Her doctor told me she hasn't gained weight for 6 months.  I think she eats well, even though I changed her diet 2 weeks ago.  (I now try to give her food every 2 - 3 hours)  She doesn't drink lot of milk, but I give her yogurts, and cheese to make up the diary.  I also started giving her PediaSure.  She just got blood work done, to see (I don't know what he's looking for)  if anything was wrong.  Can you please give me tips on how much I should be feeding her?

[Renee Radenberg]

Her weight is on the 5th percentile for her age. As a guideline for a 12 month old child should eat the following daily: Dairy 3 feedings a day – Milk (4oz), cheese (½ oz), yogurt (½ cup), or cottage cheese (¼ cup). Starch 4 feedings a day – Cereal (¼ cup), pasta (¼ cup), rice (¼ cup), bread (½ slice), or crackers (2). Fruits & Vegetables 4 feedings a day – Fruits (including 100% juice limited to only 4-6ozs) & Vegetables (¼ cup). Protein source 2 feedings a day – Meat or fish (1oz), egg (1), or beans (¼ cup). She should eat 3 meals and have snacks between meals using the foods above to be spread out throughout the day.