Help?

Does it matter if I miss the first 2 days of my fertile window aslong as I bd at my peak fertility? It starts on the 11th and ends on the 16th. I ovulate on the 16th. I won't be able to bd on the 11th and 12th but If I do from the 13th until the 18th that's definitely enough right? I do want to bd a couple days before and a couple days after just Incase I ovulate later or earlier than normal