I'm really confused right now I need help. The last time I had my men…

I'm really confused right now I need help. The last time I had my menstruation was April up till date. And right from the beginning of my menstruation it skips some months attimes, but I regularly go to gynecologist but they kept on telling me I'm fine. And now I'm married and I'm planning of having a baby but I can't spot my ovulation cos the last time I menstruate was April. So right now I'm feeling as if I'm pregnant but test is showing negative..... I'm really confused what should I do pls?