As said above, there are so many things that can cause certain symptoms, or even a number of things,it's just easier for us to try and fit them into one little box giving hope for treatment rather than think there may be multiple things going on.
Go see your GP and start the conversation saying that you are worried by your medical record, how many times you have to see them and how often you feel ill and that you don't want to be like that and can you work together to try and find a solution.
That should hopefully impress upon then that you are not just attention seeking but want to make proactical stepes to get yourself back on track.
It may take a while, a barrage of symptoms, unless they have a significant pattern of pointer can be very hard to get to grips with. It may mean making a list of problems and targetting them gradually, ie the worst first or easiest to sort first.
It may mean going for some therapy to help you cope in the mean time and assist in decreasing any stress or anxiety which may be contributing - possibly even subconsciously.
Stick to one doctor who you can talk to and deal with so you have continuity so that they may start to see a patters in your illnesses.
Sit down and make a list of what problems you have had when in the past with dates, investigations, treatments and diagnoses. You could also make a note on how this affects you in every day life so you can look at ways of making that better. Doctors can find this useful.
Take it to your doctor when you go to see them and have the chat mentioned above, ask them if they would review your medical notes in conjunction with it then agree to make another appointment to make a plan of action.
Making a diary could also help identify patterns or triggers, responses to treatment etc... and your doctor may also find this useful.
Hope this helps :) x