Quadriceps Tendonitis from Badminton

I'm having really bad pain right just above my knee cap... When I searched in Google the most accurate thing I got was quadriceps Tendonitis. I'm looking forward to use a strap or do taping, since I'm only 17 yeors old, I don't wanna look like 60 year old uncs using big knee braces or kt tape, lol... So I thought of using a knee strap. But wherever I looked I could only see strap for patellar tendonitis (below knee cap). So is there any strap which can be used for above knee pain..? And does the strap of patellar tendonitis reduce pain for quadriceps tendonitis?

I have pain when I start playing, but when I'm slightly warmed up and started playing intensely, the pain goes.. then the pain again comes after the games, when I'm at home