Back pain, nausea, vomiting...help!

The last two evenings and nights I have been absolutely miserable 😭 I think I've eaten something that made me bloated (hard to tell 😅) and the increased pressure and discomfort in causing bad lower back pain, to the extent that I can't sleep, wake up in the night a lot, and throw up. If anybody has experienced back labour before, it's that same kind of feeling, but without any tightening so I'm not worried about early labour. Has anybody else had this? Waking up in pain and needing to throw up is horrible 😩 I then feel shivery and can't get back to sleep for hours. During the day, the back pain is more manageable, as I can sit up and move around, but lying on my side really seems to make it worse. I really think the vomiting is linked to the pain. If anybody has any tips or suggestions, I'm all ears x