Is it normal for a mother to gossip behind your back?

This issue has been going on in my life for as long as I can remember, I am 19 years old and it seems like every little mistake to major problem in my life is highly exploited out of my mothers mouth to everyone she knows "including family". For instance, back in high school, like most kids I smoked a little weed now and again, I never let it get in the way of school and always passed, but the problem is when my mother found out she went berserk and told my entire family I was a mindless drug addict and ruined my rep with my family. Another example is just recently, I'm in college now I go to school full time and make straight A's, so at the end of the week on Saturday I decided to have a few drinks with my pals (no drugs), I had a great time until the next day, I didn't get to sleep until around 9 on Sunday morning and around 1 I hear an obnoxious banging on my apartment door, even though I was exhausted and hung over I decided to answer it what do you know, its my mom and dad, they drove almost 4 hours to see me and didn't bother to even call me so I could be ready. When I saw then the only words that came out of my mouth were "what the F**k. Seeing the state I was in, my mother immediately and ignorantly assumed I was on hard drugs and I needed help. I was hung over and exhausted to the extreme. They ended up driving all the way back to San Antonio, Texas where they live and in one day my phone had blown up with negative comments and insults from my aunts, uncles and grand parents, and later on that day I found out from my grand father that she told everyone including my boss that I was a coke fiend (I have never done a single hard drug in my life), now I have no way to get money cause I got fired! All over a little booze (I feel violated and set up at the very least). I've tried to reason with her and explain that I was hung over and tired but she was far to ignorant to listen. I also wanted to know why the hell they drove all the way over to Waco, Texas without telling me and she had no answer. Now let me tell you a little about my aunts and uncles and their children. Just by seeing how their live have turned out today I can tell theres been a hell of a lot more disappointment with them then I could ever do, some of them are nearing their 30's or already are in their 30's and haven't done jack with their lives, the only difference is we never hear any of it, my aunts and uncles always have kept their kids lives a secret from the rest of the family to avoid conflict and altercations. But not for me! Nope! they know every damn thing about me and it turns my heart black. This last thing I mentioned was the last straw with my mother, I HATE HER! SHES SO DAMN WEAK THAT SHE HAS TO GO TALK SH*T AND BULLSH*T BEHIND MY BACK FOR HER OWN SELF COMFORT AND AMUSEMENT, HOW SICK IS THAT! Unfortunately for me I feel that I wont be able so look at my family the same way again, or even see my younger cousins when i visit. I believe I am a nice man, I'm nice to everyone I meet and I'm always trying to do my part in the community and help the less fortunate. I also strive to succeed in life and do great things. This has really set me back and has made me feel neglected, if anyone out there is or has gone through something like this or knows how to deal with something like this please leave a comment on what you think, thank you for your time.