Toddlerhood

My 16 month old on a two nap schedule recently started taking 2-3 hour naps during her morning nap and then not going down for the second nap. This went on for about two weeks so we assumed she was dropping a nap. We then tried to push her nap to later at around 11/12 but then she suddenly stopped taking a long nap and it’s either 40 mins - 1 hour but closer to the 40 minutes. She does sleep through the night 11-12 hours I’m not sure if she just doesn’t need that much sleep anymore or if she’s going through a regression, she does have her canine teeth coming in, in addition to just turning 16 months old. Two days ago she started waking up at 6am instead of 7-7:30 like she used to and I just don’t know what to do anymore because I don’t know if she’s overtired, teething, or wanting to explore. She has always been a great sleeper and napper.