Chance of pregnancy 4 days after + OPK? really disappointed :(?

You may have a very slight chance, however I don't think you will be able to concieve this month :( usually you have a chance if you BD the day before your positive OPK, so if you did the night before your positive you may have a chance as sperm can live for up to 48 hours so as long as your egg came down the next day or 2 after BD you have a slight chance. Hopefully it was your magic month and you managed to concieve :) good luck