What Causes Cramps In The Bladder Along With Dripping Of Urine?

Hi. Over the last 10 days I have developed a bubbling sensation in my bladder, it s not particularly unpleasant but it does prompt a reaction from me. I m 27 years old and in good shape. I also have a problem at the moment with excess urine after going to toilet. I don t feel it but sometimes when I m walking away from the toilet I ll pass a tiny bit more urine, this is unpleasant and has me concerned. As does the bubbling bladder. It s more of a rapid twitch like a muscle contracting and expanding in quick succession. Any ideas what this could be? There s been no blood in the toilet or any painful symptoms.