Low back and hip pain?

I am 21 years old and have recently been having some awful problems with my lower back and hip. Particularly, my right lower back (I think the lumbar area?) has been painful and full of knotted tense muscles...and then I have some pretty morderate pain in my left hip, which is worse when I walk and more toward my back than the front of my body. This pain has been getting somewhat worse over the past month, and nothing I've tried seems to help. I have tried ice/heat, epsom salt soaks, rest, ibuprofen, and herbal/homepathic medicines as well (Arnica Montana and Glucosamine Sulfate MSM). I have not fallen or otherwise hurt myself, what do you think this could be and what should I do to feel better? I have had 2 abdominal surgeries (exploratory laparotomy 2004 and right flank hernia repair 2006) and that's bascially it, until this pain started. Any advice or help is appreciated.