Frustrating Evenings

Anslie has been really almost unbearably fussy during the evening time over the last few weeks. She usually takes her last 30 minute nap for the day between 5:30 and 6:30pm. When she wakes up from that nap, she is MONSTER BABY!!! Nothing I try will get her to stop whining. She doesn't want to nurse, eat finger foods, play with her toys, read books, watch tv, play with the dogs, get tickled, crawl, walk, have her diaper changed, be carried around, go outside, or play with any other goody she finds laying around the house. I don't know what it is. The rest of the day she is an angel, finally eating and sleeping well. It's almost like she has colic again and she goes crazy for at least an hour every single night. Any recommendations or ideas from any mommies out there?