my DS (now 18 months) took 1st steps about 3 weeks ago and still isnt very confident - he is improving though. i think you know in your head not to worry but it isnt easy not to, esp when ppl comment and you compare (as we all do). Also i think walking (like crawling which my DS was also v late on) is one of those v visible milestones, so it makes it doubly hard.
it will never hurt to see someone (though i dont think your dd is old enough for that yet) i figure and i also thought if he isnt showing signs by 18 months (he was cruising) i will take him, just to be sure it isnt a huge prob.
you know it is all ok... but i know it is good to hear it!