The very first thing I would do is check for small chips or cracks at the edges of the nubs (use a magnifying glass if you can). If that isn't the culprit, then it's most likely a combination of flexing your vaginal muscles too hard while thrusting roughly. The good news is that your vagina is one of the two places on your body which heal the fastest (the other being the inside of your mouth).

As long as you aren't in any great discomfort, it shouldn't be a huge worry. Definitely don't have unprotected sex with new partners in the mean time, as the tears could pick up infections much more easily. Good luck! less

Never had this problem, I have one glass dildo and it has little nubs all over it. Check and make sure it hasn't chipped anywhere on the toy, that sounds like a possibility. Or you may have just been too rough, try to take it easy next time you use the toy and see if it happens again maybe? less