4 year old with weird bathroom & drinking habits

My 4 year old started doing this thing where he would go to the bathroom every few minutes while watching tv or during other exciting times. He started this after we did a cross country move and kind of shook up his whole world. He’s also very enthusiastic about drinking water. I don’t think he drinks an insane amount of water but when he does get some he just chugs it. Often times he will try to burp after and other silly things which makes me think this is all behavioral. We’ve gone to Disneyland a couple times andI swear the habit totally disappears when he knows he can’t go potty constantly. But we’ve had him evaluated once at the pediatrician like 6 weeks ago and we’re going back Tuesday because I’m just so worried it’s diabetes. Has anyone else experienced behavior like this or does it sound like diabetes???