*URGENT QUESTION* PLS ANSWER

I had sex for the FIRST TIME, and by sex I mean 2-4 strokes with no condom (since we didn’t have much time and it was my first time, I just wanted to know how it felt). He had no pre-cum, and he didn’t cum inside of me either. I’m supposed to start my period on July 16th. I’ve heard that it can delay your period with it being your first time is that true? ***ALSO*** Do I have any slight chance of getting pregnant?

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Update: Thank you all for the help and advice. I appreciate it tons.

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UPDATE: I got my period last night.