Another wait and see.....I hate this!

PET/CT scan done 1/21/13.  Came back with three things to "keep an eye on".  One mildly enlarged lymph node at the base of my neck (7mm)......been there about a month...I noticed it.....but it isn't too big.  Two mildly enlarged lymph nodes in my abdomen (1cm each)......will watch but I'm pretty sure they weren't there at the time of my last scan.  And small sclerotic areas on my left femoral head (left hip)...they think these are bone islands which are benign but will watch it too.
So, anxiety abounds.  Don't know if I should be concerned or not.  If doc is OK with waiting then maybe I should be too?
Ugh.