I actually had this happen to me three/four weeks ago too but it stopped so I forgot about it but now its back. So, the last few days I have been waking up at 4 am bursting for the loo. After a few minutes I need it again and again and sometimes a tiny bit only comes out. This constant problem happens until around 10 am and I'm fine for the rest of the day. This is weird because I used to only go on the loo once a day. I thought that perhaps it could be a bladder infection but I've had other problems too such as feeling really weak at the same time I have the loo thing. I'm not used to feeling so hungry early in the morning and in fact I used to not feel an appetite when I had breakfast but now I find that I'm eating cereals, sandwiches and snacks all before 10 am.