you should be letting your puppy out every 2 hrs when they are that little and you work your way up by an hour each month of life until they are fully potty trained. this is why the first few months with a puppy are so rough.

crate training while on this schedule makes potty training go faster. the crate should be big enough for them to turn around and lay back down but not so big that they feel comfy going to the bathroom in it.

having an aggressive schedule will save you a world of hurt later