Melissa! Stop thinking the worst!
When I told the workplace, knowing I had the support of management, I had 3 secretaries come into my office, one by one, crying and telling me how brave I was. Then I got hauled out for beer by the guys. Over the next few days I had emails from virtually everyone at the office. And I was as stressed as you are. The people who didn't talk to me or email me within the first few days have turned out to be supportive but shy.
It'll be fine hun, if not all at once right away, then over time.
Dennis