Strange cycle

Pat

So I have been tracking my cycles for the past 6 months and noticed something different about this cycle. I would normally has sex before ovulation on cycle day 12 thought I ovulate about day 12 or 13. Now I have noticed I ovulate about day 15 or 16 or you could say anywhere between day 14 and 16. So this time I changed the way I do things and did the deed on day 14 at the moment I got my peak opk. After ovulation I would see a lot of white cm which decreases days before af now this cycle I'm totally dry immediately after ovulation. Anyone experienced dry cm after ovulation and got a bfp? I'm also experiencing constipation which is also new this cycle.