I Am 7 Days Into My Second Script (total Of

I am 7 days into my second script (total of 17 days) of Doxycycline for bursitis+cellulitis in my elbow & arm. The elbow is still tender, a little warm/red, and there is still the popeye knot but its hard. The bursa "busted" 6 day ago. My question is, how long before my elbow should go back to normal? Should I go back to my doctor now?