Kind of Worried

I had'd really gotten the hang of masturbating so I decided that using something like a dildo would make me orgasm, I don't own one, so I used the handle of a plastic brush, I was using it while laying on the floor with my back on the ground and my knees bent. I think I may had trapped air inside my vagina because when I was finished (still didn't orgasm), and put my underwear back on and went to try and go back to sleep, my vagina started feeling like it was releasing a lot of air bubbles, but they're still happening, is it something else? Should I be worried? 

 I feel like an idiot. (I'm 17 and I never had sex before if that makes any difference to my problem) 

Please tell me if you have any idea what this is!