Possible?

I just started taking prenatals this month after 2 years TTC. Would you think this would improve my chances for this month? I was worried about if my progesterone levels were wacked up, so i decided to see if vitamins would help. I'm 9dpo and I'm having some light cramping, a kinda fullness in my lower abdomen, and I'm tired and kinda moody, not to mention this awful headaches I've had the past 2 days. AF is due in a week.