Pregnant and not interested in my fiancé?

So my fiancé and I have been together for about 2 1/2 years. He already has a son and was ready for a baby, while I was excited and looking forward to being a first time mom myself. We agreed that we wanted to start trying for a baby and were overjoyed when we found out that I was pregnant after trying for about 6months. Now that I’m pregnant (currently 8+4w), I feel like I can’t stand my fiancé. Even though I’m the one who picked out his cologne, and I’ve always actually been turned on by his smell, I can’t stand to smell him, kiss him, hug him, and I’m not very interested in having sex with him either which I know is a little discouraging for him. He never pressures me into doing anything and respects that I’m having a really rough start to this pregnancy. I guess I just want to know if anybody else experienced this, I’m hoping it’s just a combination of all the hormones and me just being tired of feeling really shitty all of the time.