I agree. I'm loving being pregnant.
If this is your first, I can understand totally. This is my second, and my 2yo makes me too tired for the same level of excitement. If the giddiness is disturbing your work, try finding some calming techniques that work for you. Meditation, stretching, repetitive tasks, w.e works. You'll be ok, just hang in there! If those don't work, talk to your doctor.
How do u manage throughout the day? I mean, doesn't the giddiness disturb ur work?