hiya hun sorry to hear your not having a good time atm, it could possibly be swelling hun ! still very early days! as for the burning sensation if your at all concerned dont hesitate to call the nurse….if your taking the tablets i found i put on a few pounds with them, and as you cant do much but sit around i felt like a beached whale! lol im only 25days post op myself, feel so so so much better though! im able to do everything i was before including sleeping on my side!
it will all get better before you know it, 
i hope you feel better soon
xx