Religion Thoughts....

I've never been one to question my religion or the will of God.... but I wondered what if my religion was the wrong religion.
I mean no matter what religion you are, all other religions are considered wrong. A religion may not throw religion-hate to other religions, but they still consider other religions wrong because they do not share the same principles and beliefs or outlook on the outcome of life.

I just wonder if I'm in the right one sometimes because how can we all have these different religions and worship these different gods? somebody has to be wrong. All these gods cant be the ruler of this one earth.

Christianity tells me that there is one God and all other gods are irrelevant and false. but in another religion(lets say Buddhism) Buddha is the almighty and there is no one higher than him! So how do we all believe in these different religions and pray to these different gods, all of whom claim to hold the same "almighty" position?

And if thats the case are we all worshipping false idols? All these gods cant be the almighty....somebodys gotta take the L!
what if we're all wrong and there is no religion. we just live, die, and thats it. then what? idk man...

And if one religion is wrong and must take heed to another (the correct one), whats to those followers in the afterlife? can they really be held accountable for their religious ignorance?