Anxiety over leaving my baby tomorrow

My husband and I are going away for two nights tomorrow and I’m leaving my son with his grandparents and I can’t sleep currently because I’m so anxious over it 😩 I thought I’d be fine but literally Am going through my head every thing that could go wrong or hapoen to him. I think I’m more anxious now because I found out my sister/nieces are coming over and it’s going to be a family day here and everyone’s going boating etc so now I’m worried with everyone over something could happen as there are more distractions and I’m not there to keep an eye on my kid. Silly I’m sure everything will be fine but send help. I need reassurance 😩😬😭