Early pregnancy is awful. I was puking sick with this little one from about week 5 until week 22 or so. (Just in time to start the heartburn/backache section of this lovely journey.) I went to work, but wasn't very good at my job. I actually had people comment to me that I looked terrible/green/queezy/ill/tired...lovely. Not only do I feel like s%$#, I look like it too? I would say I lost my cookies maybe 6-7 times a day. I had to stop on the drive to work several times to puke by the side of the road. Once a cop slowed down to take a good long look at me. I think he figured I had tied one on the night before. I wanted him to ask me if I had been drinking just so I could yell at somebody about how horrid I felt, but he kept driving. Hangovers have nothing on early pregnancy.
I was so tired too, but with a toddler in the house, I'm pretty used to running on a partial tank. With #1, I fell asleep at my desk many times, and had to stop and nap at rest stops during my 40 minute commute so that I didn't fall asleep at the wheel.
As for the boobs, let's just say that they are a no touch zone for about 8 weeks. I was amazed at how sore they were, and how they seemed to grow bigger overnight. Too bad that amazing rack doesn't distract from how green and ill I look, eh?
If you are really very sick, you may want to know that pregnancy is covered under the ADA (disability) so if you are too sick to work, you can collect disablity checks. Not a wonderful alternative, but maybe good to know. Some work/leave policies will also credit days taken during pregnancy as part of your paid maternity leave privilage, which can be a mixed blessing, but maybe something you want to explore.
I would reccomend getting under the care of a midwife or OB ASAP, as there are some things that can help moderate (but not totally remove) your symptoms.
FWIW, we are stopping after this one, not because I think two kids is perfect, but because I really don't think I can physically handle another pregnancy without losing my mind. I feel lousy the entire 9 months, and I think DH feels lousy too having to live with me and my attitude during this "blessed time".