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From your description, you likely have an abscess that has spread beyond your tooth and into the adjacent tissue - your cheek. I wish I could tell you otherwise - truly. But you need to see a dentist (or call your physician or go to an emergency room as soon as you're able). Antibiotics may be able to contain the spread of the infection.That is important,because this type of situation has the potential to worsen and affect your general health. But antibiotics are probably essential for you as soon as possible.
I would strongly recommend that you see a dentist asap as well. In the interim, if you can have a physician prescribe antibiotics it would be wise.
I'm sorry for your issue. And I hope you're feeling 100% very soon.
Please let me know if you need additional information to answer your question. Otherwise I'd very much appreciate a positive rating for my effort.