"Morning Sickness" at night

Anyone else has "morning sickness" at night? The bile yellow stuff you throw up in the mornings? Only I get it around 7ish which is weird. And yes I do eat but less around dinner time because that's when I get more nauseated and not so much in the mornings. It's the complete opposite for me. Also, that stomach acid makes me have heartburn. I eat small meals frequently. And I still get a sour stomach at night. Idk what I'm doing wrong? I'm 7 weeks and 3 days along