Success followed by new levels of anxiety and panic

Hi Brooke –
I achieved a major career goal last week and enjoyed several days of feeling good about my accomplishment, Realizing this goal opened the door to doing even more in my work life and now I am gripped by panic and anxiety. Seriously, WTF? I’m doing lots of thought downloads and models that are helping to get some room around the feelings (carrying my Panic Purse with me) but can you talk about why this comes up after a big growth spurt? Many thanks!!