Definitely sounds like a sleep regression. Will give some random tips which worked for us.
Also, as another pp has said teeth will play a huge part in it. Personally, look out for signs of her being in pain and if I were you I'd definitely try a dose of calpol. Or even a half dose. (And I know I'll probably get hung out to dry for suggesting pain meds) it may help to settle her. When ds was a similar age he was having his come through rapidly and I had one night where every single time I put him down he'd start to to cry. It didn't matter if I was holding him for 5 mins or 45 mins. We were both in tears by the end.
Other things we did that worked were we introduced a cuddly toy (jellycat) which he still uses every night. Get several of the same so you can wash them on rotation. Trust me on that one. Gives a sense of security.
During the winter we would pre heat his cot by putting in a warm hot water bottle in while we got him ready for bed. Cold sheets/bed can be fairly upsetting. (Obviously remove water bottle and dont keep it in too long, just enough to get the cold out) over heating can be dangerous.
Put a Muslin (which I stuffed in my bra and wore for a couple of hours)flat under his fitted sheet so he could still smell me.
We also ended up introducing a dummy which he refused to take before that. We then had to take that away from him at around 12 months. But that's another challenge. He was using me as human pacifier and not actually feeding. Think it was comforting for him.
We got black out blinds (gro do some good ones) and used during naps.
We also changed where his cot was. It strangely helped massively. Not sure why though.
Theres so many sleep training methods out there. When I say we did a controlled cry method we adapted it to suit us and worked with what felt right. Every child and family is different. Again, theres a wealth of information on google. I spent ages researching and reading until we found what worked. Having DH do the majority did help though. I was far too weak and sleep deprived to follow through. As with all parenting consistency is the key to success. Which as always is easier said than done.
Another good read is the happiest baby on the block. It's very American and a bit cringe but has some really useful tips x