Longer stretches..

My son is 12.5weeks and has just started going longer stretches as night. In fact, he's going longer stretches during the day as well. He goes about 3-4hrs between feeds. He will go down around 8pm and sleep till about 3-3:30am and wake to eat... Then wake again around 7:30am.  I don't feel engorged or anything... I usually pump immediately after his 8pm feed so my husband can give him a bottle at 11pm and I can go straight to bed, but as I said... Lately he's been skipping that feed. Should I be worried about supply and wake to pump at midnight or do you think I'm ok? My breasts rarely feel engorged and when I pump, I don't feel like I get as much as I used to (all normal from what I've read)... But should I pump at midnight to keep up my supply or enjoy the sleep? Haha.