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It sounds like you are having bladder spasms. This could be due to the condition called overactive bladder. Your doctor needs to consider putting you on a medication such as oxybutynin to stop the bladder spasms to see if this helps give us all of your symptoms. You may need to see urologist to help create this. Hope this helps.
This sensation can be related to a bladder issue. The "weird sensation" is likely a bladder spasm that you are experiencing. This is likely why you are not urinating much when you have to go.
This is not bladder cancer at your age.