Hi. Welcome to JustAnswer. I am Dr Uzair.I am reviewing your post and will post back with your reply momentarily.
You are right the increased swelling shows infection and if it is causing severe pain or troubled breathing or keep increasing in size you need to go to urgent care for getting acute pain control and antibiotics for infection.Do not stress yourself it is treatable condition.
Hope this helps.
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If you do not have unbearable pain or troubled breathing due to increased swelling you can hold till Thursday but in case you develop any of these symptoms do visit an urgent care.
Please let me know if you have followup questions.