I really think that labels like "bisexual" are incredibly unhelpful because suddenly it is a "thing" when actually, this is always about PEOPLE.
If you said, "I think I am in love with Claire, what shall I do?" that is far different to saying "I think I am occasionally attracted to women."
So what? Is my answer really.
Are you annoyed that you didn't experiment with women before you met DH?
How would that change anything?
It's no different to wishing that you had experimented with lots of different men.
You ARE where you ARE. If you want to stay in that relationship, it will mean suppressing A LOT of urges, whether that means urges to sleep with other men or urges to sleep with other women, or urges to just get on a plane and start a new life in Barbados.
Your life choices are in your control. If you want to fantasise about women, that's fine. If you want to fantasise about men, that's fine. If you want to stay in a family unit with your partner, then don't get hung up about "discovering yourself" because there isn't anything to discover. You fell in love with your husband, and staying in love and staying married will be a lot of hard work - whether you are bisexual or straight is irrelevant at this point.