I have been sitting here debating whether to say anything because I didn't know if you would want me to. I figured WTH did I have to lose.
Maybe the reason she is calling more now is because she knows she has lost control on things. Before you would have done anything in your power to be nice in hopes of her coming home. Now she has lost that power and is trying to figure out a way to keep you in her clutches.
There are others that will fight with you and tell you that you are being stubborn regarding switching the day. You know me, I say whatever I want and don't sugar coat anything. I say you are doing the right thing by not switching. She is playing the controlling game. I think you are doing the right thing by not letting her have the upper hand.
Do you feel bad when you tell her no? If you answer no then don't worry about it. If you answer yes then you need to think about things.
Regarding the dating...there is nothing wrong with going out with someone as friends until you are ready to take it to the next level. Sometimes having a friend of the opposite sex is nice. Just be upfront with them and tell them you are not looking for anything more than friendship.
I can honestly tell you that even after all is said and done that there are still ups and downs. I don't know if you ever really get off the roller coaster.
I hope you find peace and happiness Trapt, you deserve it.