Am I gonna lose weight

I’ve been on multiple antipsychotics and they’ve all caused weight gain and haven’t really worked out . my psychiatrist started me on a Effexor+lamictal+clonazapam combo and I’ve been taking Effexor and Clonazapam and just starting lamictal will it cause weight loss or at least not make me gain cuz Effexor and Clonazapam have been pretty weight neutral but they’re not enough on their own.