I implore you, go to the doctor. I understand that you're scared but what's even scarier is the size of the clots you are passing. Having an irregular period is abnormal within itself, especially when it is happening over a long period of time. It may be as simple as the doctor testing your hormone levels and you taking meds or birth control to regulate your period.
Either way, this board can only do so much. Even if someone took a guess and told you exactly what the problem is you STILL have to go to the doctor. There are no home remedies, it isn't normal, and it won't pass. Don't you want relief from the constant bleeding and clots? You aren't sexual active now, but one day you will be. One day you will want children--this will intefere with that, big time.
Hey thanks for the comment I get that I need to go to the doctors I just thought some one might have had the same problems as me. I'm seeing the doctor next week I need to sort myself out ignoring it may cost me! Thank u though :)