I feel a sting in my vag sometimes at random times. It feels like a spike is poking it, then it goes away. What the heck is going on?
It's probably from the masturbation that you've posted about. You should give it a rest for a week or so and if it hasn't subsided or gets worse, you should see a doctor. GPs can perform pelvic exams so that your parents don't find out if necessary.
I second the masturbation thing. Especially if you're being too rough with toys. I used to play with myself a lot too (even if no penetration was involved for me) and sometimes I would also get sore. I think It's normal.