Feeling so sick, help!

Jc

Hi everyone. I’m about 5-6 weeks pregnant ( or atleast I think). my first ultrasound isn’t until Jan 21st. Anyway, I am feeling so incredibly sick. My nausea is terrible and my lower back is killing me. I’ve hear Unisom is allowed to be take early and it helps the nausea. Has anyone tried that?? Or any other remedies are welcome as well. For right now I’ve just been trying to keep something small in my stomach and keep hydrated. TIA!