Ovulation

I had an HSG a month ago, everything was normal. Before the test I'd have my LH surge on CD 14 @ 6:20 AM like clockwork. Last cycle I surged CD 12. Lastnight I tested just for the heck of it and I got a smiley face. It was CD 9....I was shocked that it was that early. Has this happened to anyone else? I had my BD'ing schedule planned for the 12th or 14th CD so we BD 2 nights in a row....I'm so nervous about not waiting long enough between each time for his sperm to mature and replenish themselves...lol