Still very confusing...

So. I had my "confirmation" to christianity when I was 16. I was sure, I had thought very long and hard before my confirmation and was sure of the step I was taking. I wasn't forced into it.

Now...

If tomorrow I decide, after thinking again long and hard, that I made the wrong decision, that the "True" word of God is the one followed by muslims and I want to convert to Islam...I wouldn't be able to, because I must stick to my previous choice and I cannot change faith. So even if I believe with all my heart that Islam is the right religion for me, I cannot convert because I made my choice of religion twelve years ago?

Doesn't sound right...