Your 6mths baby has multiple problems like Respiratory tract
infection and Gastroenteritis
and in addition signs of rickets
(Vitamin D Deficiency).These may not necessarily be because of teething
but due to some bacterial infection and due to poor immunity.
I would suggest that you start weaning your child appropriately if not started yet.Discuss with her doctor about the right supplements especially if your child has rickets.Give her a good nutritious diet and keep her vaccinations up to date to prevent infections.