Just hit 15 weeks, CAN'T STOP PEEING

Okay, first off I drink an ungodly amount of water. I have a container from the gas station that's 100oz, and I drink 3-5 a day. (I know water poisoning is a real thing but I already talked to my doctor and since I've been doing it so long, there's no reason to stop now)

I literally have to pee several times an hour. It is becoming unbearable.

Is it just because the kid is bigger and heavier now? I hate it so much. Its like I live on the toilet now.

Next appointment is in 5 days, I'll ask my doctor too, but I was just wondering if this happens to anyone else