Mutual attraction between me and my co worker but I'm engaged and pregnant, what do I do?

I think you're just full of hormones and you are stressed about the wedding and about being pregnant. Having your co-worker is just kind of a distraction from you "real life" He's like, in another world that is not stressful... it's distracting you from your everyday thoughts. As long as you don't act upon it, don't go out with him, and don't let your emotions get too carried away I wouldn't worry about it. You love you fiance and that's all that matters. Don't let him get any closer to you and tell him your pregnant. He will probably back off a little if you tell him that. Distance yourself so you don't make a mistake. But don't completely ignore him. Keep it FRIENDly