Mood swings

I’m 16 weeks pregnant and until now luckily I’ve felt pretty good mentally and physically. However, I have a 4 year old who has just started to not listen to anything I say. My moods are so up and down because of this and it’s putting me in a bad mood.

I’m calm with her, I explain things to her but my god she’s frustrating sometimes. It makes me and my husband argue sometimes too.

Does anyone else have any mood swings? I think this is general annoyance as she’s pushing boundaries but I’m usually a placid person.