Just when I was about to go to bed last night I started to get a burning sensation, plus pain. It wasn't relieved by urinating, so I sat up for a few hours drinking copious amounts of water and took paracetamol. Eventually, I got to bed, but not surprisingly, woke up a few times to go to the loo. This morning the pain has gone, but not the burning sensation. I assume I have a UTI. I had cystitis many years ago when I first met my husband (!) and have had milder burning, which I have headed off quickly with drinking loads of water. Any advice on how to manage this? When it is wise to seek medical advice?