Are there breastfeeding seminars or groups I can join in the Mandaluyong/Ortigas area?

There are local groups who specialize in organizing seminars and fun activities for breastfeeding moms. I strongly recommend you to follow this non-profit association called L.A.T.C.H. They hold seminars and even open forums every month for moms and expectant mothers. Be updated by liking their page at https://www.facebook.com/theperfectLATCH/. You can also follow them on twitter - @theperfectLATCH.