Dissonance is usually used to refer to cognitive dissonance - two simultaneous thoughts that don't co-exist. Such as "I believe in the Bible but the Bible tells me things I hate".
The word is just temptation. It's not even necessarily a conflict with your religion. Sex before marriage is a common taboo and LOTS of people have sex before marriage no matter how religious they are 'cause... people wanna have sex and that situation has always existed.
It's a thing for you to work out with your beliefs and maybe a religious authority figure you trust. There's not really a special word for it though or if there is it's not gona lend you any more insight.
No, it is finding your own spirituality. Organized religions try to force all pegs into pre-shaped holes with the hard-fast rules and expectations, which seldom adapt to the evolution of people and societies. Your individual spiritual beliefs/needs may not fit any of the pre-ordained religions.