Question and advise

So I keep getting told that I'm not getting pregnant bc I don't eat. First off i, do eat just not a lot during the day. My main meal is dinner and snack after. I don't eat breakfast and usually have fiber bar for lunch then I eat my dinner. I don't feel like this is the problem bc my cycles are very regular and normal and I feel like they wouldn't be if I want eating enough or right. Any suggestions???