Lower sex drive during pregnancy

Lanie • 21 yrs old. Happily engaged. Mother to a beautiful baby girl🎀
I'm 8 weeks and 5 days today to be exact, and I am experiencing a very low sex drive. Like very low, if any. I'm also trying to get through the morning sickness, but when it comes to my fiance and I trying to get down to business I am just not interested at all.  Infact I even get a little nauseous thinking about it. I feel so terrible! I heard that women have an increase in sexual drive during their pregnancy, why am I having the opposite? It's nothing towards my fiance either, I love him dearly I'm just never in the mood for sex now. Has anyone else been experiencing this? Or have any tips or advice?