Dizzy, mostly while at work?

So im 12w2d and I get dizzy spells or I will feel discombobulated/unable to focus on anything now, more so while I am at work. I know it's normal to begin feeling dizzy around this time during pregnancy, but I was wondering if any of you who have also experienced this had any tips? It's becoming a problem when I work a 9 hour shift and feel like this on and off through a lot of it.