Little ones acting different?

My 2 year old has been so clingy with me the past week, usually she’s only like this when her dad is working away but he’s been at home and she won’t leave my side.

She’s been waking up in the night and will only go to sleep when I’m in the room, she screams if it’s anyone else.

Then this morning I was saying goodbye to her before nursery and when I asked her to give me a kiss, she lifted my top and kissed my stomach. We haven’t said anything about the pregnancy around her at all, it’s like she knows?!?