just like other mothers have said, it seems to be the normal time for kids to start doing this. my daughter spent a good 6 months of barely eating anything, while my friend's son rarely ate anything for nearly a yr. GOOD THING...they WON'T starve themselves! When my daughter was going through this, I used to leave out bowls of cereal (always 2-3 options, and of course, dry....just a handful of each), some small pretzel sticks, fruit puffs, and dried fruit, sometimes grapes (peel them if you've never given them to her before..you can even cut them in 1/2). at dinner time, i tried to do finger foods (which i know you said you do) just put her in her high chair to eat, then whether she ate, or just took one bite, or refused to eat..once i figured she was done, i would say ok, you're not interested, fine...put her down, the chair away, and left the finger foods she was having for dinner out on a table for her to have access to them. and surprisingly, she would eat throughout the day (after a couple months of me being so upset that she wouldn't eat, and trying everything, THIS was the ONLY way to get her to eat). so just TRY to feed her at her normal times, then whether or not she eats, just leave some little bowls out with a couple different choices out on a table she can get to, and pretend to ignore her every time she goes near the food. just clean, read, watch tv, ANYTHING except watch her (at least not enough for her to realize that you're watching) and she'll eat something.
they tend to "graze" at this point, but don't worry, it WILL pass. now, she usually eats her 3 meals, sometimes she gives me a problem, but i always have something out for her to pick on throughout the day. now that she's almost 2, i usually leave hand-fulls of different cereals (a fav is special K, and ANY chex) and sometimes pretzels...i just try to scrape of most of the salt so there's no issues of her having too much salt.
so, try the "grazing" approach, and make sure she's getting the 18-24 oz of milk/formula a day that she's supposed to (unless her pediatrician said something different), and her vitamins, and she will be fine. just remember that they won't starve themselves, as long as they have access to the food, they'll eat if they're hungry. good luck, and hang in there. hope some of this helped.