Trufitgirl,
A certain level of protection is logically necessary for our level of incontinence. However, I, and many others in this group, often wear a level of absorbency that goes a little beyond what we probably will need.
This "overkill" in absorbency is what I usually do when I will be in public. It may be in the form of a heavier diaper than I may need, an extra booster pad, or simply planning to change earlier than I need to in order to reduce the risk of a leak. The overkill is what I do both for emotional reassurance and as a practical measure against the likelihood of having public accident.
Then, as Rob and the other "John" have said, I trust my protective measures and get on with living my life without worrying about it

.
And, if you have that accident - and we all do so from time to time - your loved ones will understand. The public will not really care. Just clean up and move forward without dwelling on it.
--John