So, has anyone experienced having a missed period, testing only to get a BFN, but then get a BFP later on?

I'm on day 35 of my cycle (which is usually 31 days) and I only ever miss if I'm super super stressed out. Which I'm not. No period yet, but terrible symptoms - cramps, increased CM, pain around my hips, deathly tired, gross skin, sore boobs, the whole nine yards.

I tested twice, today and yesterday (though admittedly not with AM pee) using a First Response and both times it was resoundingly negative.

Obviously, now I've posted this my period will appear!

But, seriously, is it possible I could be pregnant but it's not showing up yet?