You twisted your ankle, it hurts, and you cannot tell whether it is a sprain or a break. If that is you, the sources below explain why it is hard to tell at home.
Why how it feels is not enough
Cleveland Clinic says it's not always easy to know if your ankle is broken just by how it feels. AAOS OrthoInfo says symptoms of a severe sprain are similar to those of a broken bone and require prompt medical evaluation.
The two symptom lists
AAOS OrthoInfo lists sprain symptoms as pain at rest and with weightbearing or activity, swelling, bruising, tenderness to touch, and instability of the ankle, or a feeling that your ankle is giving out. Cleveland Clinic lists broken ankle symptoms as sudden, severe ankle pain, not being able to put weight on it, pain when you touch it, bruising and swelling. Pain, swelling and bruising show up on both lists, so the lists alone will not tell you which injury you have. Reading them costs nothing and needs no training, but it cannot replace an examination.
Reading on sprains and fractures
Cleveland Clinic's sprained ankle page covers the sprain side. For fractures, a meta-analysis in PMC examines a removable brace as an alternative to cast immobilization, and a case-control study compares internal fixation with manual reduction in ankle fracture healing and inflammation.
When to stop and get it checked
Do not wait to see which way it goes. A severe sprain needs prompt medical evaluation and a break can feel the same, so get the ankle examined if you cannot put weight on it or the pain is sudden and severe.
A note for first-timers
Whether you are seen in Wood Dale or farther afield, describe what you feel and when it started, and let the examiner do the sorting.