My child is able to walk properly.

Dears, My 2 year old child got slipped 2 months back, she reported the pain on her foot, we gone through X_ray, Ultrasound, and few blood tests,I went to 3 different Dr and took all these. Nothing found on bones, but my child in every 5 days stopped walking  for 1-2 day and after 2 days she would be able to walk. She reports pain sometimes on her foot. As per Dr and having reports they told she has weekness and she will be alright soon. Hemoglobin is less on my child around 8.4  and some calcium deficiency. We are giving the syrup and medicines to reduce these deficiency. But that's not working out, in every 3 days she reports pain. Please suggest what to do, Drs taking light but I am worried As it's been 2 months now. My child stopped consuming food also, she just take milk. She used to eat chapati, but now that also she left in last 4 days. Please suggest what can be the problem.