Well, IMHO, when I was a child, my parents never knew I wet the bed until the morning!!! Your pup is so young & will inevitably need the loo through the night at some point & it's a really good sign that your pup comes to tell you "hey I need wee wees". You just need to recognise the help me signs. Normally it's a big "lick - get up & let me out", & if you don't respond it'll be a cry or a wee on the floor. Pups can't always do it without your help at that age :-)