Why do I have a weak bladder since giving up smoking?

I gave up smoking in January and since I gave up smoking I seem to have a much weaker bladder and am going to the toilet quite a lot, sometimes very frequent,I have had to really limit my fluid intake because of it as this makes it worse yet I have not increased my fluid intake since giving up smoking,is this problem related anyway to giving up smoking or could it be an underlined problem that is just a coincidence and should get advice from the doctor.