1st baby! Dying to know what this little drumstick is. Ramzi anyone? (Vaginal US)

Ashley • We TTC our first child for 9 mo. and had our baby boy on November 12, 2016! I have MTHFR. We are expecting our second child, a girl, due May 7th!
It really didn't seem real until today. By the grace of the good Lord, there is legitimately a child growing inside me. I can't wait to find out if it's a boy or girl. Thoughts please?