Sorry if this question has a really obvious answer but I'm a first time mum and not sure if this is normal or not.
I have a 20 month old DS who normally drinks around 3 cups (training/toddler/sippy cups) of water or very, very dilute juice a day. In the past week or two he's been drinking alot more than normal, averaging 10-11 cups per day. Sometimes he's so thirsty he drinks two cups straight off and is gasping for air in-between sips (like you do when you're so thirsty you don't want to stop drinking to take a breath). It's all passing through him fine, so much so that after an hour or two his nappies are nearly falling off him with the weight of the urine inside.
Is this normal at this time of year? It's warm in our house but not too warm like a few weeks ago. Should I be concerned about diabetes etc or am I just thinking the worst because of my family history (diabetes runs in our family but not normally in childhood, we have late onset, gestational and one case of childhood but that's my 12 year old niece after my sister had gestational diabetes)?
My DS seems perfectly healthy apart from this (what I think is) excessive drinking. Please put my mind at ease as I don't want to go to the drs with DS unless I have to.