I miscalculated, and AF is due 30th-31st. I am 6dpo, I think, and am having pms symptoms right on time. But I cramped a smidge this morning and one big painful one tonight, and I'm up with acid reflux, which never happens. My first and only heartburn happened when i was pregnant. And I don't typically cramp except when AF is starting. But it's too early for implantation! Mixed signals are killing me, but I suspect this isn't my month. Trying to be cautiously optimistic! I don't want to write it off this soon, but don't want to be disappointed when I test. Ugh.