3 hour glucose test! 😩

Well I'm here at the hospital to get my blood drawn thinking only having to do it twice nope they do it 4 times but my question is, is it safe for me to go to work after this? I work part time at a biker bar and it's fall flood run which means it will get busy and crazy and last time I had my blood drawn I got dizzy and light headed but now my stomach is feeling funny and weird but I'm perfectly calm I have water with me