Fertility chances according to a diet

Well so currently am 20 years old.I have learned about female fertility in detail just a few months ago as our country isn't frank about it so I didn't get a chance to know bout it..From now on I started charting my cycle n it I have a normal menstrual cycle,I think I do also ovulate but the thing is that I found out that some certain foods affects ur fertility badly like sweets,chicken,refined carbs etc.So should I quit all these foods or can I sometimes eat them? Another thing is that my first period started when I was 9..So what's the possibility for me to concieve in later life.Will my menopause occur early? 

I apologise if any grammertical mistake occurs.Thank you All..