is this normal??

Smile • I'm 23 years old. I'm an orthodontic assistant. Proud mom of two cats. && in a relationship with my best friend est 2014
This fell out after I peed the other day at work (it happens every month usually) I just want to know I'm not the only one this happens to. I had heavy creamy discharge too :/ doesn't smell. Doesn't burn to pee. Doesn't hurt. What is it? Is it normal?