Can anyone support pentecostalism with fact?

I have been raised in a pentecostal church but I am having a hard time really understanding it..I amarried and my husband will support me no matter what I decide about church...But I have no proof that it is the real truth! I don't mind scripture quoting but please support it with a fact...I was very comfortable in my life before, until I got out and realized there is a whole 'nother world out there!!! If you have answers please post them :) Thanks!