Your symptoms could be due to early pregnancy
as well as peri-menstrual. A pregnancy test taken a week after the missed period with a fresh early morning sample of urine is useful. As per your age, it is the physical state and not the mental state that is considered ( since you say that you are prepared to handle a baby); the body needs to be mature enough to receive a baby. There are no known foods to enhance fertility
. You can also get a blood test
for pregnancy if you wish for definite confirmation. Hope your query is answered. Take care.