I HAVE 31 DAY CYCLE SOME TIME 32?!

Day 15 or 16 is when you should ovulate. However, since sperm can last in the fallopian tubes for up to a week, you should have sex the seven days prior as well.

if that's the time every month, u probably got your first period near that time don't worry each period lasts about 5 days than off for like 23 days or so and then the next period is a little longer so your good

I would say days: 13-17 are the best days to try.