Please help! ๐Ÿ™๐Ÿผ

So I thought this was my month...sadly AF showed up 2 days earlier than expected and now I need to start over. I have a longer cycle and Iโ€™m hoping someone can tell me when they think is the best time to BD to give me better chances of conceiving. Iโ€™m going to be using opk too. Thanks all! :)