As women our bodies do all kind of funky things that we can't explain. You may just have a yeast infection but to be sure you should get checked. My doctor tells me it is good to let your body (whatever funky thing it maybe doing at any given time) run it's course and that means no douching. When you douch you wash out the good bacteria along with bad. So, let your period run it's course and then if you are still having problems you should definitely talk to a doctor.
I hope that this helps.