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That really doesn't sound like the vet examined her very well. With a swollen abdomen they should have taken extreme care in case they caused a rupture.
Does she feel cold to the touch. If the vet has indeed caused a rupture there could be internal damage and there is unlikely to be anything they could do as sadly she is quite an old hammy now however if you feel she is in pain I would ring their emergency number for advice. Keep her warm but not hot and offer some soft foods like some porridge or babyfood. Give a bowl of water in case she is unable to stand up. Remove any things that are in her way and make the cage easy to move around for now. Take out the wheel. Poor little girl I do hope she is more comfortable soon.