Ugh why do I feel so miserable !?

I’m currently on CD 23. The last four days I’ve been nauseous from 10am-10pm each day. I’m so miserable. I’m so sensitive to smell and my lower stomach is sensitive. It seriously feels like early pregnancy. I’m also so bloated I can’t stand it. I’ve never been through PMS this bad before. I took a pregnancy test bc I’m feeling SO PREGNANT. But I’m not! Anyway, I’m a hypochondriac so now I’m freaking out thinking something is wrong with me. Why am I so nauseous 😩? Anyone experience nauseous as a PMS symptom?