My Periods Are. Irregular Am 22yrs Old But I May

My periods are. Irregular am 22yrs old but i may have them 3,4 or 5(at most)times a year.this has been like this since my first time at 14..my doctor tried different medicine but each type only works for a while then my body becomes used to it..

Problem is i prefer them to be absent because each time i have them its torture..the cramps are horrible. heavy flow.high fever. toothache. migrines. Weight gain and horrendous mood swings(these cost me my job once)..
What is wrong with me..can you help?