Has anyone ever had this happen?

LO woke up this morning and her whole body was hot but she wasn't sweaty. Her room was cool. I took her temp and it was 100.6. I figured I was staying home with her but didn't text my boss just yet. I nursed her. I kept feeling her and noticed she was getting cooler. I took her temp again about 15-20 minutes later and it was 99. She was acting normal the entire time. I decided to wait another 15-20 minutes and see what happened before I made a decision. Her temp was completely normal and we got ready to go.