Plz help me!

Ok so I won't give yall too much info cause its gross🤢and very embarrassing 🤦‍♀️.

I was trying to impress my bf or surprise him by masturbate in front of him(saying how this is how I want his d*ck in me), and let's just say it was a BIG surprise for both of us🤦‍♀️😳😳. I totally freaked him out! Idk how to explain why the heck it even happened, I have never pooped before while using a dildo? Does anyone have any suggestions or advice on this and how to explain and possibly help this from not happening. I'm posting this anonymous because I'm just too embarrassed 😳!

It was in my vagina fyi