Worried my date took his condom off when topping me NSFW

Basically, for some reason I’m scared to death that my date took his condom off while having sex w me yesterday. I have no reason to think this but now that I’ve had this thought I can’t get rid of it. (I’m OCD diagnosed) So my question is: can you feel it when a guy if he ejaculates inside of you? And is there any more telltale signs that he has? Sorry if this isn’t the right sub but I’ve no idea where else to ask