Dreams and Time Travel

My dreams have taught me a lot. For instance going back in time to change something is a bad thing and now that knowing what's going to happen is also a bad thing as it can affect things and badly. 

I had one dream full of action and adventure with a happy ending, which I can't remember too well but I know it was awesome! Then I woke up but then I went back to sleep and started the same dream again- this time with a difference I had already experienced the last dream and was not following it as I should have.

For instance giving spoilers and knowing too much causes a mind-blowing such as revealing this guy was a doctor to his sister caused mass mayhem such as her saying he shouldn't be one as if it was a massively bad thing, knowing the rope was going to snap causing hestiation and causing near demise but thankfully doctor man did appear. All in all going down the wrong route with a less pleasant future, not to mention the intergalatic war I may have accidentally caused. With the teletubbies in no less. Apparentally all of tv shows/films/games were in the same universe or something as Star Wars/Halo or something aliens had the Teletubbies as part of their fleet and they were scary buggers cause when I pretended to scream (it was sarcasm) then this guy said that I should scream and mentioned how scary they are.

Overall time travel is proving to be pretty bad.