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Ok and thanks for your input. Sorry to heard about yourissue.
Well base on the information’s provided it seems you are having thrombophlebits of veins or cellulitis. This need urgent consultation with your doctor right now. If that is not possible please go to ER right now. Depending upon your physical finding he will suggest you to go for few more tests like blood culture, x ray of leg, doppler ultrasound and may be CT scan as well. Your Antibiotics should be change as previous one did not help you and infect you got worsen. Please take a naproxen tablet and go to ER.
Thank you and feel free to ask any other question regarding this issue.