First congratulations on getting the job that says a lot about your qualification and how good you are.
Second don't be hard on yourself I know it's hard but try to be positive. I notice less stress less bo issues.
Just curious were you wearing perfume? What I notice is perfume and bo don't mesh well together.
Stop wearing scented products. I am sure you have try many things but take chlorophyll and activated charcoal and drink plenty of water. Try to exercise and maybe this weekend do a cleanse the night before work ear light dinner. The morning of ear very light maybe fruit and drink plenty water.
Have an emergency kit to take to work wipes, toothbrush and toothpaste and mouth was and wash cloth in a zip lock bag. During your break you can clean up. Also take extra pads.
There are things you can do to make your bo less notice sometimes.
Good luck and try your best:-)