Which part of your awrah are you referring to? If it is the hair, simply fixed it and continue your prayer as exposing it a bit like this unintentionally is ok.

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If a person does not pray at all (zero), he is a kafir and not a Muslim.

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Prayer is valid with just the recitation of al Fatiha, although one is missing out on a sunnah by not reciting another surah. The prayer is valid.

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