Dizzy spells?!

Hi, so I’m 18 weeks and 1 day today and the past week I started a new job and since starting my dizzy spells have gotten worse I notice that if I’m too hot everything will start to sound distant then I’ll start to feel really dizzy and I’ll feel as if I’m about to faint, so I try and make my way to the break room or restroom to sit for just a moment to regain myself, anyone else experience this???