Keeping comfortable temperature during night sleep


Ladies, how do you dress and keep your babies warm during their night sleep? I bought fleece pajamas for my son and use sleeping bag without sleeves for his night sleep; we are trying to keep the room temp 70-74 F but when he wakes up for feeding (1-3am) his hands are cold and legs are cool as well. Torzo is nicely warm. He has a runny nose for a week already. I am thinking of starting using a blanket on top of all above mentioned but am scared of suffocation. Any advice?