AF just came....

?Melissa? • 35y, mom to 4 (2G & 2B), together for almost 15yrs and married almost 13yrs
So I input today that my AF came, so I was wondering when or what day should I start to BD in hopes of conceiving a boy?? I'll be happy just to get pg, but I want a boy I already have two girls who I adore and love with all of my heart, but if I have another girl I will love her just as much as my other girls! What do u guys think?