What are my chances of getting pregnant day after O?

[Hopingsomeday]

I got a positive OPK yesterday around 1pm and didnt get to BD until tonight . Am I out? I felt O pain all day but took a OPK around 12pm and wait not as dark as the day before ;/

 

[Deethehippy]

They say that day after O it's pretty unlikely. But of course O could have occured in the evening of that particular day and then if you BD the next morning maybe it would be possible? I think an egg only survives 12-24 hours.