Oh @Gelati I feel so sad for you. You haven't failed him. Don't be so hard on yourself. You didn't want to be sick and it's not your fault. Don't blame yourself. Formula top up is fine until you fully recover. Better than him starving. I feel really sad though that all your hard work has been reversed by this cold. I would be gutted too. But I still want to tell you don't be too hard on yourself. Make sure you look after yourself.