Drinking water, hardly using the bathroom

So I’ve drank a gallon of water today, that’s normal for me as I usually by the end of the night drink 1.5 gallons, on a normal day I’d use the bathroom often obviously since Intaking so much water, but today I’ve only used the bathroom a couple of times... does anyone know if this is something to be concerned about?

I’m 8 weeks pregnant for reference.