Just going on corrected age - even a full termer is recommended not to let go more than about 5hrs. A sleepy baby at this stage isn't necessarily a good thing (as much as we all want that sleep! haha) so yeah, I would wake at about 5 hrs to keep those feeds up. And I'd only allow 1 stretch like that a day too for a while yet.

Hooray for reaching your due date! I remember DD behaving like a newborn for soooo long, it was so lovely to have her finally approaching corrected 6 weeks and being more awake and actually start to smile and stuff!