My daughter is 7months old and dosen't look to eat,I started to give her ragi and also cereals since one month?

she throws tantrums and cries the hell out when we try to make her eat.Is it OK for her to be only be on my milk.she weighs 16pounds and 1.9 feet's tall.What should we do to make her eat and what else can we give her to eat considering that we are lacto vegetarian. What disadvantages do force feeding has on a child. Kindly Suggest.