Going by our baby buddies at the moment, it seems 7/8 months is a very unsettled time, there's lots of us losing sleep at the moment! We had this with DS as well around this time. It could well be a developmental stage that they're all going through, combined with teeth moving around and waking up to practice crawling & sitting up!

It could be something that just needs to be ridden out. IMO if bub needs comfort, then the best thing is to give it. DD sometimes needs a feed, and sometimes settles with a cuddle & dummy. I know from experience that it doesn't last forever. Sleeping patterns change all the time, just as bub changes all the time.

I hope you can get some sleep soon. Sometimes just one good sleep gives us the energy to keep going through these rough patches.

ETA: just thought I'd add that we're considering setting up a cot in DS's room, coz I have a feeling it's us waking her up too (DH snoring and us just moving around in bed) but I don't actually like the thought of her not being next to me. So we'll see