Trying to concieve


I am 42 years old and I know the risks of conceiving at my age.... please be negative comments. I had my oldest son when I was 20, and 6 years ago I had my youngest ,sadly he passed away, but on between those times I was never pregnant. Drs say there is no reason I cannot concieve, yet it's so hard to. Has anybody else had this problem for no reason at all?