first, stop combing. The knots may be easier to work out when it's dry.
Second. Calm down. Have a cup of tea.
Third. You've clarified and it's still not good, so try using a very gently shampoo to gently clean it, and then a massive handful of conditioner all over, and then another massive handful of conditioner for luck. Leave the conditioner on for a while and then rinse out.
Don't do Co washing or any other kind, and don't add anything to the conditioner. Just plain, normal conditioner.
Obviously your hair has reacted to something. I can't tell you what it is.
Good luck.
If you hair is smooth after rinsing out the masses of conditioner, then blast it with the cold water to smooth the cuticles and try gently combing. If it won't comb easily wait until it's dry and then gently tease out the knots.
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