If you have never had a yeast infection I would go to the doctor to confirm this. They can tell just by looking at it. If they cant then usually its a BV infection.
I am married and have a son who is 2.5 yrs old.
Well the only way to know for sure is to go to a doctor.
Was it itchy? clumpy? Are you sexually active?
If it's odourless then it's most likely a yeast infection (thrush). Does it itch at all? If it itches you can buy a cream over the counter that will help with the itch. You can also buy a tablet or pessary which should clear the infection up as well.