I wish there was something that could make it better, but unfortunately i don't think there is. Maybe taking your bra off for awhile might take some pressure off. But honestly its probably the baby stretching. My baby is way low but he still kicks my ribs and pushes my guts way up into them. Its so painful.
It honestly probibly is her... my lil girl is super low to but she jabs right into my ribs all the time n it hurts so bad. There unfortunately is nothing that can be done except pray she comes lol good luck