Hi M. ... I've been through this too. I think everyone with kids has, actually lol
Best advice ... wait it out. Keep offering up the meals, keep offering the spoon/fork, and add some variety and spice. In the beginning, I kept everything bland, but once I started offering my son what we were eating, chock full of spices, he started gobbling. But, keep in mind, these bouts of pickiness come and go, so just be patient. My Father gave me the best answer yet, when I said, "Dad, Mike just won't eat anything!" He said, "Honey, trust me, he WON'T starve himself--Believe me, when he's hungry, he'll eat!" Truth is, he was right. When your daughter goes through another growth spurt--shortly--she'll probably eat everything in sight! Until then, give her any vitamin supplements your pediatrician recommends, and just hang in there ... She definitely WON'T starve herself lol
I also agree with another Mom who suggested cutting back on fluids. I made the same mistake early on, and still sometimes do, because it seems like that's all he'll "eat." But, truthfully, she may just be filling up on the liquids. So, try cutting back on that (especially before dinner), and see if that helps.
Incidentally, my son is going through a picky eating thing yeat again. For example, one week, he can't get enough apples ("bapples" he calls 'em) and pears, and now I have a bowl of them rotting on my counter LOL He spits it all out like it's poison. Sheesh!
Good luck, sweetie!