FTM question...🙄

So my LO is two months old and I came across a video about signs for autism. The first one I noticed was the hand flapping. She sometimes does a milder version of that but it doesn’t go on and on she just does it a couple times. The next thing I noticed was last night right before bed she was crying hysterically and started to shake her head from side to side. I haven’t been able to find anything about finding autism in a two month old so I’m just curious what everyone has to say. Please no mean comments, I’m just curious...