S.T.
Oh honey, it sounds like you may be going through depression or an anxiety attack something worse. I think you might to get in touch with a Dr. and get something to help you calm down. Crying when she cries is not good. I was went through a patch like that about a month ago and went to the Dr and she gave me some Lexapro, which helped me almost instantly feel better(not that it is for everyone), but something you might consider.
Crying is a normal part of development for a baby. It is how they communicate with you when they have no words to tell you what is wrong. She may be sensing that you are feeling nervous and then responding to it by fussing. Maybe she has begun to outgrow her 'schedule'. If she has been taking a nap that late for a while, she may be letting you know she doesn't feel like she needs a nap that late, and you might try and adjust the times...maybe moving the time of her morning nap so that she is not too fussy by evening and then skipping the evening nap..?? it is kind of hard to give advice without more details.