I went back to work after being off for several years, so I completely understand! I have good and bad days, but have small group of co-workers that support me. Unfortunately, we don't look sick and anything people read is going to suggest that you have this condition because you're an overweight woman..which usually suggests to people that it's in your control. If this isn't the case for you, then you might get more understanding. I honestly have had to learn not to deal with the majority of people and focus on the positive/supportive folks. There is some good information in the Useful Guides and Print Outs
section, so I would suggest starting there and using IHRF for those people who really seem interested in your well being.
I would also suggest looking into FMLA for protection once you have worked 1250 hours because there are co-workers and employers that will use IIH against you. I hate to sound so negative, but it comes from experience. I've lost jobs and have been made miserable because of my limitations.. definitely take the time to learn the policies and protect yourself.
Good luck, and most importantly, take care of yourself!!!