it is hard (staying in control), but you can do it! you didn't say how old your son is. keeping a schedule is great for both parent and child, but it takes time for everyone to learn the schedule. hang in there.
i had the same problem with my youngest son. i would feed him at 8pm and put him to bed, and he would awake at 10pm. i would feed him (even though he shouldn't be hungry, and i am nursing). and he got into a bad pattern of waking up after 2 hours. so what i finally had to do was let him cry it out at night. i wouldn't feed him until at least 5 hours had passed. (i called it baby boot camp.) he was also 4months old, so i added one serving of rice cereal at dinner time...which i think helped.
the crying is hard to ignore, but ignore it. if you go in there, he has won. you need to win. take a shower, listen to music, watch a movie, etc...
as far as wrapping him, is there a way you can make the room cooler?
it will pass. my youngest son is now 7mo., and he's sleeping from 8pm to 7am with one feeding around 5am.
hope this helps. if not, i hope it was an encouragement.