Vaginal help :( please help!?

i started my periods when i was 13 years old, they were normal in the begining but now theyre off the wall, sometimes i go six months without having a cycle, the last time i had my period was maybe 2 or 3 months ago. sometimes i get a brownish or whitish discharge from down there but i read some where it could be obvulatin, but i dont see how if my cycles are weird. ive also read it could be a bacteria infection or maybe a yeast problem because recently ive been getting a fishy smell :( ive never had sex a day in my life but i am hypertensive and because of that i could be at risk for type two diabetes if i became obese. could that explain whats going on? i know this isnt normal and ive told my parents about my weird cycles but my dad has the insurance and wont take me to see a specialist because his sister told him weird cycles are normal in the early years after menstration. i honestly think theres something wrong, if there is how serious is it? im only 16 years old. i havent told my parents about the fishy smell because its way to embarising to talk about and i do keep good hygene. please help :( i really want kids in the future, god willing, could this stop me from having any?