I want to start by saying do NOT feel guilty about looking for other jobs. Do you actually think tis company would feel guilty about disciplining you if you weren't good at your job - NO! You are after all just another employee all be it a very good one.
Do you have any idea of what you want to do? What career path would you like to go down? Do you want to use your degree for this? You should have an idea of this before searching for another job begins. You do seem settled in your post at the moment so it is quite feasible to stay working there until you have the answers to your questions.
It may be an idea to start a part time business and this would give you wider scope and maybe more ideas.
By the way, i am also focusing on changing employment - so good luck to both of us!
Let us know how you get on.