Feeling faint

Anne
Today I took a shower after I got up, and got really dizzy halfway through. I felt faint and nauseous, like I was going to pass out. I sat on the bathroom floor and realized I hadn't eaten anything yet today I texted my hubby and he brought me a breakfast smoothie. After drinking it I felt good enough to finish my shower. 
I still feel weak, though. I ate some breakfast and drank a big glass of water. I did have a really busy last two days, so maybe that has something to do with it? I just feel utterly spent and I haven't done anything but shower and run some laundry. 😳
Anyone else feeling dizzy/weak? I'm 10 weeks and 4 days today. This level of exhaustion is definitely something new for me.