I re-started the 5x5 and am trying to increase my squat as much as possible by the end of the year, I wanted to hit 300 if I could. I weigh 147 now and friday I went for my heavy triple of 210lbs and did 4 for the hell of it, and on the fifth my hip started hurting. I went on and did my last 8 reps like a fool thinking it was just pain and not injury. But I guess its a hip flexor, or whatever muscle is close to my groin and I get a fairly sharp pain when I squat down or stretch. I went to squat today and it still hadn't healed, so I went light and cut out early. Is this something I should work through and get used to as a squatter, or should I take it easy and let it take its course?