Not really sure if I should be worried?

So this is my first time posting on here and not really sure how to ask or tell so please bare with me I'm sorry, last night I had sex with my partner and we did use protection. He came in the condom and threw it away. The morning after we had a short, no cumming but unprotected, morning sex. My question is, could there have been cum on his penis from the night before that stayed on and transferred to me??