I think you need to see a doctor you might have a urine infection which can make you need the toilet often
Run the bath sink slowly with the plug in at a trickle so it babbles, try to make the same sound as urinating. then relax a few seconds after you stop and wait for the calling and then finish, you will be surprised at how much was still in your bladder, Often, you can have a B.M. that is pressing on the urider , Don't be in such a hurry
You may want to consult either with your primary care physician or a urologist - an enlarged prostate can make it difficult to fully empty the bladder and can cause some of these symptoms.
I would recommend consulting a Urologist.