You could go to the Ministry building opp Hamad, they deal with public health and children's affairs. There is a social services for children but i don't know where it is. I would get someone else to witness this before though, this lady could make your life difficult if it's your word against hers. If I was in the UK I would call the Police and say I smell gas coming from the house then let them find out for themselves, that way you only look stupid for getting it wrong rather than your neighbour thinking you reported her.
Lastly, you are a very good person, it's easy to turn the other cheek JJ