Thank you for the information. I am sorry to hear about your symptoms.
Based on your description, you seem to have pain, swelling, warm to touch, and difficulty in walking. All these symptoms could be related to each other. If you do not have any history of heart/liver/kidney related problem, then this is most likely a localized problem such as arthritis, cellulitis, or gout. Pain, redness, warm to touch symptoms are suggesting the possibility of cellulitis or gout, but other potential causes can also present with similar features. Thus, it is better to get a blood test and physical exam to confirm the diagnosis, in that way you would know how to manage it appropriately. In the meantime, keep on doing conservative measures such as rest, OTC pain meds, and elevation. Thus, your physician visit, at least once, is required to make the final diagnosis.
Please let me know if you have any other question.