Being uncertain about your sexuality can be really confusing. It isn't fair to round upon OP for having confusing/chaotic thoughts.
I have a friend who was gay, married a woman, the love of her life. Less than a year later she realised she wanted kids and a husband with whom to have them. So she divorced and married her now husband and has had 1 child and is expecting their second (I think).
Sadly she has now met 'the absolute love of her life' another woman.
I lost her friendship when, having listened and supported her in trying to understand her feelings and to make decisions, I suggested that it wasn't being bi-sexual that was her issue, but falling madly in love and not being able to sustain the 'fairy tale feeling' forever.
I don't think her sexuality is her problem. She is just always acting on 'lust' and doesn't have much scruple against starting affairs. I suspect if she was either straight or gay she would be equally faithless. She is, in my opinion, just really bad at love and fidelity.
Before you act consider whether you are letting curiosity kill the cat or if your relationship with your DH is simply not fulfilling you any longer. Would you want to leave him if you had not had bi-curious feelings? If the answer is yes, leave him and then look for new relationships.
Good luck working your way through this.