M.S.
This is her time. At 3 1/2 months im surprised she let you do it that long. I' ve noticed anything past two months they get upset. This is her way of sayiny enough is enough. It becomes restrictive and then they can't stretch as much. If she is already trying to roll over you have a very active baby who is ready to go, by swaddling her you are only going to make her cranky... I hope this helps you. Have a great day.