Please take care of yourself Clod!! Ditto Bruce's advice, and try your best to eat well. That will help both you and your baby cope with the stress. There are tons of brands of frozen dinners that not only taste good but are good for you (Lean Cuisine, Healthy Choice, Weight Watchers etc.). Don't have a freezer at work? No matter, I regularly forget about mine in my bag till lunch, and they are perfectly fine. In fact they heat faster when they are partially thawed
Buy some aromatherapy oil and put some on a cotton ball and stick it in your drawer. When you start to feel overwhelmed, stop, open your drawer and take a few deep breaths to calm yourself down and focus on what's really important... High stress can lead to lots of little complications during pregnancy that might add up to big ones.
Good luck!