aww, poor sophie!
I really wouldnt be surprised if solids are upsetting her so much, it is a lot for her digestive system to work through after having nothing but liquid her whole life. maybe she's been having too much variety too soon or it could just be one specific thing that doesnt agree with her.
Just do whatever you need to do now to settle her, even if it is boobfeeding around the clock. if you're feeling so frustrated, imagine how she's feeling. give it a couple of days and then see how she is and start again with solids.
thats my 2 cents anyways