Constipation

Hi guys. Before today my last BM was Friday. I had to take lactulose to stimulate the BM though. I am on Prevacid however didn't take it today so I could have a BM as that is what is causing the constipation.  I am going to start taking culturelle probiotics. Do you think that will help me be regular again as well as curing my acid reflux and rebuilding my stomach lining?