Just looking for some advice please. My almost 18 week old was ever so slightly under weight at her 12 week checkup she is a petite little thing but has such put on weight nicely and is hitting milestones etc . This past week though I'm finding it impossible to get her to take more than 3oz 4oz of I'm very lucky . She would normally take 5pm every 3-4 hours and would cry for 5oz usually at the 3 hour mark. She slept through the night 2 nights this week I gave her a dream feed both nights at 10.30 where she only took 3oz and then didn't wake until 6am again only taking 3oz and this morning 2.5oz I'm starting to really worry as is is under eating by quiet a bit I also noticed mucus in her nappy last night but she is otherwise happy and in good spirits . I'm not sure of her current weight.