I had absolutely no intuition as to the sex of my baby, but I absolutely KNEW the night I conceived that I had conceived. The ultrasound confirmed the date by the age of the fetus. I don't know how I knew, but I knew. We had been trying for almost a year and somehow that night, I just knew immediately that we had finally succeeded.
I think people can be very intuitive about these things. If you are intuitive about other stuff, I think the chances are even higher that you are right.
On the other hand, my mother, who is USUALLY very intuitive about so many things, was sure my baby was a girl. She appeared in many dreams to my mom and her name was Lily. But I ended up having a boy!
Plus, I had dreams that I was having twins, but I was only carrying one. So you never know. I'd be interested to hear what the outcome is for you, whether you are right about the gender and the twins.