@Tori she is 5 weeks old
My baby was very cold until he was around 5 months old. I would put him in a jumper over the sleep suit then sleeping bag. But there are general guidelines to give you an indication for each temperature range on many websites like Tommy tippee or lullaby trust
Mine is in a sleepsuit and 2.5 tog bag, our room doesn't dip below 20 at the moment. He's 1 week old
My room is never below 20 and he is in a sleepsuit and a 2.5tog sleep suit or he wears a long sleeve vest a sleepsuit and 2.5 tog sleeping bag.
I would drop the vest at that temp x
depending on what age, as baby gets older they can regulate their temperature better, i'd say for around 3m and under- that's pretty good, maybe could go without the sleep bag or sleep suit- however my daughter is 10 months now, and she only has her sleep safe clothes (tight fitting/flame retardant)