What are the chances I brought them home?

Went to my boyfriend’s house, his house doesn’t have bedbugs but his best friend does. On Sunday (today is Tuesday) his friend came inside his room and stood by the door to talk to my boyfriend for I say 2-5 minutes. Then he walks back out, and hangs outside for the next hour or so before leaving. I’m highly allergic to bed bug bites, so I express my concern and of course my boyfriend is understanding.

2 nights at his house, no bites. Now I am itching a little but don’t see any welts/bites anywhere so it’s probably just anxiety. I was not directly exposed, as my boyfriend’s house is not infested.