So, to be clear, if she is teething should I leave her in cot and just talk to her? Often she'll show no signs of teething during the day and I'll only suspect anything when bedtime comes, or when she has a NW.This is why I'm so confused. How will I know when the teething has ended, so to speak?
For Finn IMHO he was teething from months 4 - 13. No two ways about it. We may have had some periods which were less fussy than others, but that kid continued to pop teeth all year. In reality, most kids are probably teething in their first year full stop. Some handle it better than others, some have periods where the teeth aren't shifting or poking through as much, and some can feel every move a tooth makes (or so it would seem). But 20 teeth have to come through by the time they are 2 or shortly thereafter. That's a lot of work. And teeth start forming in the embryo stage of pregnancy! It just takes them the time from birth on to finish forming, move down and erupt. How many teeth does she have at the moment and which teeth are still to come through? Is she drooling, chewing, biting? Does cold in her mouth soothe her?
Really teething will only end when all teeth are in. We have a quiet spell at the moment in that Finn has 16 of his teeth. 4 more molars to come. Currently he's getting chewier and droolier again so we know they are starting to do their thing.
It's true that teeth pain can manifest more at night when they aren't as distracted, it did for us. If she's medicated and you have done what you can to ease the discomfort, I would say your job is really done. There's not much you can do.
Some choose not to sleep train when teething but for us it would have meant no one getting sleep during our entire first year. So really we had to give it a hard go regardless. And it meant at times not picking him up or removing him from the crib, just settling him in there with a hand on his back or our voices. When he was really ill (fever etc.) we would bring him into our room in his travel cot and I would just lean over the side of my bed with my hand in the cot. Maximize sleep! I know you want to stay away from that lest it turn into co-sleeping so I would just stay in her room, reassure her but let her know that she needs to go to sleep. You could, if she's really unsettled, sleep on her floor ala GW. But since you have already used WI/WO I would likely stick with one method or it may confuse or muddy the waters.
I think bedtime will be later tonight. That's a long nap and she's going to need a decent A time, likely 5 hrs. But follow her and see what she shows you. She may be ready sooner if her night was crappy.