CURSED VIBRATOR!?

I bought my first bullet vibrator, it was perfect for about 3 uses, mind you I had cleaned it and left batteries out when not in use well I was fiddling around with it and I was putting the batteries in (cap was off) and I felt a slight vibration, at first I thought it was the batteries moving around in there but I kept trying and it started vibrating like normal I was like holy shit I fixed it! I put the cap on and it stopped working, I pushed the button, no luck. I took the cap off and it started just buzzing away again 😂😂 what is wrong with my bullet omg haha