Strained Ab Muscle or Hernia?

I recently visted a chiropractor who actually ended up over-adjusting my hip.  After repetitive visits over the past 3 weeks it seems to be back in place.  I am still sore throuhgout the area due to the muscles and bones being worked with so much.  However, I have had an odd swelling in the lower right side of my abdomen since this has happend.  Could this just be a severely strained muscle due to the muscles overcompensating for the hip being "out"?  Or could it be worse and be a hernia?

Other notes:
-Whenever I ice the area the swelling does decrease
-The area feels like it is tugging?
-Gets worse when sitting all day
-Swelling decreases during sleep

[Zak_Han]

Gets worse when sitting all day ,Swelling decreases during sleep...
possibly it sound hernia, but,diagnosis should be given by doc.