Rather than going into the possibilities of deeper-psychological theories of paranoia and notions of superstitions... (at least for now)
Let's consider this... perhaps your shyness, to your visibly diapered self, has more to do with your own lack of acceptance of it - for yourself... even as an AB/DL and carer...
Supposing this, let's say that you are in AB mode (do you regress to this state or, simply enjoy the accoutrements?)... There are other aspects of your mind such as the subconscious -for example*... that are still active, even though not in the conscious mind... basically, if you haven't reconciled with either or both AB/DL... some part of you is going to be at odds with it still... even if, you otherwise do enjoy it...
In other words... you are feeling under invisible scrutiny because, you haven't come to full terms with this yourself...
If you are locking your door and there actually aren't any hidden-cameras... you should be safe, to be in an exposed diaper...
If I were to offer a suggestion, it would be to secure your privacy then, be the role of carer to yourself, with an exposed diaper...
Nurture yourself...
I hope that this helps you,
For now and, my best to you,
-Marka