Ask HN: Is my amazon prime account compromised?

So, last night I got an automated confirmation email from amazon saying that I ordered DJI Phantom Drone and a warranty on camera lens. I first checked if its not a phishing or scam email. Which it was not. I logged into amazon and I see the "Your Orders" showing these 2 items as recently ordered. They were all shipped to my address. Which I find really strange. I don't remember doing this. Because, I was not even in front of a computer yesterday evening which is when I saw this email. I don't share my amazon account.

1. I canceled both the order. 2. I changed my amazon password. 3. I contacted amazon and told them about this.

Any other precautions or measures needed to be taken? Has anyone here experienced this before?