When you firs start the process of manifesting the life you want you want for yourself, you may still have the residual effect of your old mindset attached to you. This is fine and understandable in the beginning, however as time goes on, it is important to work on shedding those feelings as much as you can. Anxiety leads to doubt, and doubt blocks manifestations from becoming a reality.
Practice daily positive thinking; do the necessary things to remove negativity from your life. These things take time, but once you get them done, your manifestations will come to reality faster and faster every time.