I do the same thing! I find since I've started the program that I don't get as panicky as I used to in the same situations that I used to. Then I get frustrated because I think, how am I going to do successful exposure work if I don't get as worked up about this or that as I used to - how will I beat this if I can't take full advantage of exposure work?! What I have started doing is rather than planning exposure work, I use it when I am feeling anxious or panicky at the moment. For me, it works well this way. Maybe you can do that also.
I think it's because we now know that we are in more control in whatever the situation may be, which makes us feel less anxious naturally. Don't take that as a failure! It's a huge accomplishment!! Think how long it has been for you to get to that point and be proud of yourself!!