Can't stop the feelings

So I'm bisexual not like openly but I've felt that way for a very long time. Very few ppl know that about me. I'm married to a man who knows this about me and loves me and trusts me regardless of my attractions. I usually only have eyes for him and have for a over 2 years of our relationship. Like I stopped noticing other attractive ppl bc I'm so in love with my husband however, im pregnant and I don't know if it's the hormones or what but I keep being attracted to females I'm around... like sexual fantasies and dreams. I can't seem to stop them and I'm horny like all the time but not for my husband. I'm not acting on them of course just can't stop my brain. Advice anyone?