My cycle is usually only 25 days long, and I only ovulated 13 days ago. I had (what seemed like) IB yesterday, but I took a test this morning and it was a BFN. I am due for my period anytime (it's day 25) and I'm usually right on time, so I am just curious if since I have a shorter cycle and I just had IB yesterday would it take me a few days to get that BFP?