Please someone tell me they’ve had this happen and have successfully retrieved what they were looking for!

My lovely 3 year old says he put my wedding rings down the bath drain. Problem is I have no idea when it happened so I could’ve ran the bath about 4 times since then. Has anybody ever successfully retrieved theirs before? We’re calling a plumber tomorrow but I’m not very optimistic that they’ll be found...

Any hope is welcomed. I’m 7 months pregnant and have been bawling about it all night. 😭😭