Extremely dizzy

Hello ladies,
I'm 7+3 and extremely dizzy. Like its hard to walk into another room dizzy. This is pregnancy #2 and do not remember feeling like this at all with my first. Also constant nausea and got sick earlier today after smelling a weird smell. Not sure if I'm dehydrated or if blood pressure is very low but my husband is picking up our son from daycare today because I'm not comfortable driving. Should I be concerned? Has anyone else has this? I feel awful but it's also starting to scare me!!