I ache...

I take health for granted, so being felled by back and leg aches is very difficult.  Also very difficult to stay positive when it hurts this much.  So instead of yoga helping me stay healthy, I've been plagued by physical problems.  I can't believe how much has happened this past year--seems like the worst started with tearing my right quad.  I'm not sure it ever healed properly; my right thigh, hip and lower back currently ache constantly.  What may have done it yesterday was the amount of time I spent doing balance (one legged poses).  I do vrksasana (tree pose) with variations,  virabhadrasana III (warrior III), and ardha chandrasana II (half moon).  Plus the usual--sun salutation, virabhadrasana I and II.  Ot maybe it was when I sat in the beginning pose of seated forward fold--maybe I pulled my leg.  Whatever it was, it's been a tough day.