Flat feet and knock knees cricket?

I am a fast bowler, i have flat feet and knock knees, is this a threat, at the age of 15. I can bowling the ball about 120kmh, fastest ive bowled is 121.3kmh. The problem is I presume im injury prone however i have never injured my leg before except a bone bruise on my metetarsal. How bad is it i continue playing. I take physiotherapy and my flat feet are quite severe.