Vacation ruined

So I have been on vacation a week now. Before I went I saw in MyTime that it was approved before my weeked. I go in today to double check what day I come back. I see that time and attendance has canceled my vacation in MyTime. My old bosses last day at our store was the day it got approved. He was sent to a nother store not by his choice. My new boss insists that it's just a mistake and she we'll fix it. I just don't trust corporate I think someone is trying to get me fired. No one told me my vacation was canceled. I trust my new boss but don't trust corporate. So the rest of my vacation is ruined. All I we'll be able to think about tell I get back on the 23th is they are trying to fire me. If they did they would have to pay me out 255 hours vacation. I would be fine financially. I just don't like the feeling of not knowing. I'm thinking of asking if I can cut my vacation short just to find out. I know they would love that. So now I call my union rep first thing tomorrow and go and see my time and attendance coworker. In the end being fired would be a good thing for me as I could find a much better paying job easy. Should I try and go back to work early? I don't want to cause trouble for my time and attendance coworker as I like her. I just can't stand the feeling of not knowing. I feel like if they are trying to fire me I need to get my rep on this asap as I'm not going to just let them with our exercising my rights.

So that's the question should I go back early to get the ball rolling? Should I just start looking for A new job? I'm in Fred Myers Oregon 555 Union. Should I talk to my union rep before talking to time and attendance?