too much caffeine one time harmful?

I'm 12 weeks and today gave into making a half caf coffee, using half my normal decaf and half of my husbands French press espresso from Starbucks. I felt great, got so much done and no jitters or rapid heart beat for me. My hubs though is worried and now I am...can one time of possibly too much caffeine hurt my baby?😩 I regret it now! No way to tell how much caffeine it was, I filled a mason jar with ice and filled it half and half. Any words for peace of mind?!