Try this: Get a pendulum. You could easily use a cross and chain or something like that. Pendulums move either round in a circle or to and fro. Decide what, for you, is going to be 'Yes' and 'No'. Find a time when you can be alone and undisturbed. Sit at the table. Relax yourself completely. Now look at your left hand (presuming this is the hand on which you wear your rings). Imagine your rings are back on your finger. Really try to see them there. The next step is to bring up the joy in you that you will actually have when they are back on your finger. Now close your eyes and say in your mind, 'Find, find, find', as many times as you like, all the time feeling calm and peaceful and happy.
This isn't mumbo-jumbo! Presuming that your rings haven't been stolen or moved by someone else, you know where they are! (You've just forgotten!) And what you're trying to do here is to access your deeper mind.
Now hold the pendulum, between thumb and forefinger, about 2" from the table-top and ask questions that would have a 'Yes' or 'No' answer. Begin with, 'Are my rings in the house?', if the answer is 'Yes', narrow it down. i.e. 'Are my rings in the kitchen?' Continue with this until (hopefully) you find out where they are. Don't worry if you don't get a definitive answer, or find your rings straight away.
Over the next few hours, or days, gently repeat in your mind, 'Find, find, find.' And keep the absolute joy and expectation in your mind and body of your rings being returned to you. (Watch your dreams too!)
Good luck! (And have fun with this - no gloomy-doomy thoughts!)