At my wits end!

M💙

My now formula fed 13w old baby is suffering really bad with silent reflux. We’ve tried;

Sitting up after feeds

Burping frequently

Ranitidine / Zantac

Milk thickener

Gaviscon

Lactose free milk

What else can I do? Does anyone have any tips? I’m arranging a dr appointment but just incase anyone else has experienced similar. Please help!!