New to bbt...

So we've been ttc for 7 months, have been tracking with opk and cm checks. This cycle I decided to start tracking bbt as it's just about the only thing I haven't tried yet.

Problem is I am not sure what my chart should look like. The most I think I know is that bbt rises slightly after ovulation?

Does it stay high if BFP or what should I be looking for?

Confused!