leeinmemphis,
I'd like to commend you for listening to those feelings. I know exactly what you are talking about....many, many times I've gotten those same feelings on a dozer and each time I back off and call a pro (who also happens to be a good friend). I've never regretted calling in help for special situations I'm uncomfortable with. Plus, here's a factor you may not have thought of....my wife and family know full well that I will not hesitate to call in a pro when those feelings happen....as a result, they never worry about me working with heavy equipment plus they always support me when I take on a new project, which is quite often.
Wishing you the best in this and future projects.