Lo more tired lately

Hello there, lately my daughter will be in the middle of crawling and then she’ll just lay in the floor like she’s exhausted or something. She often wakes during the night and takes a nap around 9-10am. I can’t help but I worry due to the fact that she was a little warm yesterday and the day before. I gave her some Tylenol and she seems to be back at normal temp I’m not sure if maybe some teeth or something may be coming in or what the issue may be. Have any of you ladies experienced this with your babies?