Thanks for your query.
Your child has gastric upset and loss of appetite is part of ongoing process.
Causes of nose bleed is:infection,nose picking,trauma.
Since she is having headache with nose bleed,i suggest you to get her examined by pediatrician
In the meantime give her plenty of fluids,fruit juices,curd,soft diet
she should not do nose picking,apply paraffin
drops .to keep area moist.
Wishing your baby good health.