I lost 2 parts of mine between 30 & 31 weeks. Then it all stopped & my doctor said it was fine because it was the entire plug (this is second pregnancy so I know it wasn't whole plug) maybe check in with your doc incase
I lost some of mine while having sex...doc told me not to worry because it rejuvinates itself! The only time you need to worry is if you lose some and start having cramps then definitely call your doc!