Sleep

Looking for advise please My girl turned 15 months yesterday but this has been going on for atleast 3 weeks now she used to sleep fine over night wake up a couple of times for a quick resettle or her dummy but she is awake every hour now throughout the night or sometimes awake for 1-2 hours at a time It’s happened kind of the same time we have transitioned her into her new room but also at the same time she’s gone from having 2 naps to 1 as she was refusing her afternoon nap so she now has 1 hour-1 hour 15 minute nap after her lunch around 12 with a bedtime of 7:15-7:30pm she wakes between 6:30-6:45 usually She had 2 days where she had a 2 hour nap and she was awake for 2-3 hours in the night Last week she went back to sleeping through for 3 nights but now we’re back to the night wakings every hour and she’s so upset inconsolable I try and settle her in her cot she will sometimes drift off but then wake an hour after and then if she doesn’t settle in her cot I end up bringing her out and cuddling her on me for atleast an hour and then transferring her back I just don’t know what to do anymore as this isn’t sustainable I’m absolutely exhausted doing it on my own most nights as my partner has to get up at 4am for work and it’s just really getting to me and bringing me down I also feel like she’s just in a constant circle of being overtired now I don’t know what to do anymore, last week I thought we cracked it when she started sleeping through again but I don’t know now☹️