Sleeping through the night

My daughter will be 7 months old in a week. She still doesn’t sleep throughout the night. She’s constantly waking up and it’s getting even harder because I’m having a back to back pregnancy and am currently 13 weeks pregnant. So I’m super exhausted. I was told I’d get some relief by now but I’m getting as much sleep if not less then when she was a newborn. Any suggestions on getting her to sleep at least a majority of the night without waking up? I already do baths at night and she is eating solids & formula.