This priest said that what I am doing is not sinful, but since he noted my continual obsessing torment over this question, he told me that if I have qualms about it, I should not do it if I feel like I am sinning - despite the fact that it is not intrinsically sinful.
You should follow your priest's advice, rather than relying on the internet. While many people have good intentions, their "experience" in moral theology often consists of nothing more than a good search engine, or a Catholic book or two. Soliciting advice in the absence of a good traditional priest is one thing, but it is not necessary when you have already spoken to one.
If you are doing this job for necessary income, pray to God to help you find another one that stresses you less. Otherwise, quit. Something doesn't have to be sinful in order for it to be "not right" for
you.