Good luck and speed on the patent drawings, slumberland. Don't focus your (negative) energy on the fact that someone had access to your ideas. It's a concern, but right now it's blocking the task that you need to complete now.
Focus on positive thoughts (I love greatday.com) each day before you complete your task.If possible, break it into chunks so it won't be so much pressure. Give yourself a reasonable timeline (i.e. a week per drawing). Visualize that time is on your side and that the patent process is a process that will work in your favor.
HTH
