Am I overexerting myself?

I had knee op to remove a small ganglion cyst and remove a substantial amount of fat pad, debridment. Bakers cyst 4.5 x 3 x 1cm. No meniscus tear was seen during surgery.

I did the exercises the surgeon and physio told me to but my lateral knee feels tight and warm every morning and night. Knee is still round and slightly swollen, as expected on day 5 post op. No redness.

I had knee brace but only wear when I'm outside walking. I didn't use crutches because it didn't hurt. I did not even eat any painkillers as there is no pain. I am currently on prophylaxis antibiotic and eterecoxib for inflammation.

I'm on post op day 5. Starting Sunday, I'm walking on 6 - 8k steps a day with uphill and downhills. Stairs and uneven slopes. My family thinks I'm walking too much, causing the tightness and swelling.

Am I overexerting?