Choking is very scary, but actually happens a lot.
Let her work it out, the gagging and retching is her trying to shift the item thats stuck.
They can take hours or just 1/2 an hour. Only if she's been choking for more than 5 hours should you run her to a vet. The only other thing to know is IF she stops breathing (very very rare in choke) you could perform the Ratty Fling (google it) to try to start her breathing again. DO NOT do this if she IS breathing as it could lodge the item and kill her.
Let her work it out, the gagging and retching is her trying to shift the item thats stuck.
They can take hours or just 1/2 an hour. Only if she's been choking for more than 5 hours should you run her to a vet. The only other thing to know is IF she stops breathing (very very rare in choke) you could perform the Ratty Fling (google it) to try to start her breathing again. DO NOT do this if she IS breathing as it could lodge the item and kill her.