Newbie here so sorry if I use some wrong terms,
Today I was rolling down my driveway backwards in first gear but had the clutch in so I was rolling freely. When I got to the street a car came by very fast and because I'm still new to the whole stick shift thing I let go of the clutch and hit the brake causing me to stall at 5 MPH or so. When I turned my Jeep back on I noticed the RPMs shot up to around 2000 and stayed there when i was in neutral or had the clutch in and also makes a buzzing noise. Then I pressed my brakes and they would barely budge and I could only slow down a tiny amount. Any ideas of what is wrong or how these could be connected? Anything I can do on my own to try to fix it, or should I just go to the shop?