I have a lot of mental health issues and sometimes they mean that I can’t pray due to being unsure of my surroundings for example. Once I get back in my right mind again what do I do? The longest episode I have been out of it has been three days. I just can’t face making up those prayers. What do I do?

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In your case all you need to do is that every time you miss a prayer you make it up when you are in your normal mental state.