Mucus plug- 28 weeks?

Beth • Married 1/5/13. Margot Renee born 3/1/16. 💕
Have any of you lost part of your mucus plug yet? I'm 28 weeks along and after using the restroom this morning there was a gelatinous discharge streaked with red when I wiped. I called my OBGYN and she said it sounded like part of my mucus plug, but that I shouldn't be too concerned unless the bleeding gets heavier or I start having contractions. I'm a ftm and new to all of this. I trust my doctor completely but am still pretty freaked out.