In the French speaking Community you can contact La Ligue des familles www.laligue.be
In the Flemish Speaking Community you can turn to Gezinsbond www.gezinsbond.be/en
In the Brussels Region, there is the network for expectant parents and families in Belgium http://bctbelgium.org
All of these organisations will help you with any questions you have.
A list of NGOs in Brussels and Wallonia working in the social field supporting families: http://pro.guidesocial.be/associations
In Flanders, or as a Dutch-speaking in Brussels: www.fov.be/spip.php?article48 you can also contact a Centrum voor Algemeen Welzijnswerk http://www.caw.be/. These centers have doctors, psychologists, social workers, lawyers who can support you.