Question about AfterLife.?

when im born a muslim and now going through times where i just question god and religion and all that type of stuff. so what my question is do you belive in god/religion/afterlife?. Many people tell me that gods real theres heaven and all. some just say no there isn't people just dont want to face the "fact" that they cant live forever. also i hear the bible is rewritten by people, and the quran is fake. just a couple of days ago i seen a program on TV that there was a guy who died for 10 min. came back to life and said he saw nothing. that **** is so confusing i dont know what to think anymore and its ******* with my head. what do you think?