I'm on cycle #3 and just started using OPKs this cycle and learned that I ovulate on CD 17 or 18. My last two cycles were 25 and 26 days, so now I'm worried I don't have enough time between my ovulation and my next cycle. I know most sites say you need between 10-12 days after ovulation for implantation so I'm nervous it won't take. Please give me some happy positive stories