Weak flow of urine, always feel need to.

Every few times a week, I always feel the need to go to toilet, ALOT OF TIMES IN A DAY , i go and nothing comes out. a few droplets only. At nightime i sometimes need the toilet i go nothing comes out , i come back and after 10 mins , I GET THE URGENCY IN MY LOWER PART OF BODY SAYING GO TO THE TOILET!! . It is really urgent , which is why I have to go . Again nothing comes out. When i get the urgency , i get a really weak flow of urine. I think I have bloating, constipation and abdomen pain. A few months ago I started to have really bad itching everywhere. I also have really bad fatigue, I sleep really well, but in class I cant concentrate much, I feel really tired. I will put general health, as I don't know what I might have. I know for certain I have some sort of illness, disease or whatever. Because it is repetitive all of these, when ever one of these symptoms goes another comes back. It is annoying me .