How to ease a mouth pain as a result of ingredients of mouth wash?!

I bought a new mouth wash "Macleans", I don't know what is wrong with it but I just rinsed my mouth with it and now it hurts so much. It hurts me really a lot in the inside of my cheeks and it hurts like being burnt. I rinsed immediately with plenty of water, chamomile tea, I even tried milk but it still hurts me. Please give me any suggestions how to make it better because I am really tired and I want to sleep. As I was afraid it might be allergy reaction which doesn't seem so, I took one medicine against allergy just in case. Please help me with suggestion how to ease the pain.Health Question & Answer

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