Is there a ghost/entity in my house, could it be angry or mad?

Ok, I was a HUGE sceptic, never believed in paranormal, anything. This is about to sound all made up and fake, but I can 100% assure you it is true. So a couple nights ago I was laying down in my bed surfing the net on my iphone, out of nowhere my parents room slams shut, like hard. I thought it was maybe my dad or mom grumpy, but then my mom texts me from her bed scared out of her wits asking me if I did that. So finally she wakes my dad up and askes him to go look around me and him searched the house high and low, didn't see anything. It gets ten times weirder, the next day around 4 I just got home from a workout to find my parents gone, my sister was home when they left, I looked outside and saw my dads truck gone, looked in my garage, and my moms car was gone, like I was out working on my dirt bike for a bit, drank a soda and did all this stuff where her car is parked, I whent inside to say hi to my sister and asked her why my parents took separate cars, she said they didn't and I said argued with her about it until she opend the garage door and the car was right in its place. Like right where i was standing and everything. I'm trying to convince my parents her car was not there. They don't believe me. I know what I saw. I'm 100% sure her car was not in its place. I felt her engine it felt cold as if it was taken no where or drivin. I know for a fact no one pushed it out trying to steal it because my driveway is a big hill and could not be pushed back up. I'm not sure how this happened or why… I don't understand. I'm not in anyway mental or nor do I have any problems.

I totally believe you. I'm pretty skeptic, and usually when I'm spooked, I can find a logical explanation. Or make one up.
But ultimately, you can't explain everything, no matter how smart you are or how much research you do.
I've never heard of anyone, even my most gullible friends, being hurt by a supernatural being. So I wouldn't worry about your safety.
If you can't find a logical reason for what happened, and it doesn't happen again, most likely there's some logical reason for what happened.
If it does happen again, I wouldn't worry. Keep your karma clean, and you should have nothing to worry about.