Severe back pain

Marina • Ectopic 👼🏼 10/2015. Pregnant 🤰🏻 01/2016 Baby girl 👧🏻09/29/2016. Miscarriage 👼🏼 08/2018. Pregnant 🤰🏻 11/2018
I don't know if it's from the vommiting or what but my lower back is killing me. I've tried every sleeping position and nothing works. I'm only 7 weeks. Any help? I only go an hour of sleep last night so I'm desperate.