Is CD 10 too early to start BD?

I usually ovulate between CD13-CD16. My husband isn’t home every day so I get nervous that we might miss my ovulation if he’s not home. Last month we only got to BD on CD 12 but I had a late ovulation (CD 16) so that didn’t go as planned.

Should we start now or is it still too early? Also, should we use preseed to help the sperm out a bit since I don’t have ewcm yet?

TIA

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