Frequent urination?

I’ve tried looking on google and bing, but can’t find much of anything relevant to what I was searching. What I did find has me worried. I plan on calling his pediatrician tomorrow about this.

My son is 21 months old. I’m about to start potty training, but he is still not talking much or show much interest in using his potty.

What really has me worried, is the past few weeks, when he urinates, he overfills his diaper and I end up having to change his entire outfit. The past few days, it’s been about 2 to 3 times a day changing everything.

I change him at least once every 30 minutes to an hour and a half and I check him every 30-45 minutes depending when he last ate or had something to drink. He does drink a lot at one time. He has the right size pull up on too. (3t/4t -he’s pretty tall for his age.)

Anyone else experience this? Is it normal? I’m worried it might be diabetes. :(