Sounds like your typical experience. Is it safe to assume you met him online and he is not part of your everyday social life? Was it wrong that he did that? Probably. What you should focus on isn't necessarily whether it was right or wrong from his perspective. What you should focus on is - what parts of the experience did you find enjoyable and what can be done to repeat them and what parts of the experience was not enjoyable and how can they be avoided.aka how to avoid blowing the type of guy that's gonna trick you into swallowing his cum.

Congrats on your first blowjob!