I know the dread of getting the beta, but you never know. When I did my first ivf, I knew without a doubt that it was going to be negative, and I felt the cramping and felling of AF coming on. I cried and cried. Then I called a friend and cried more. Turns out the beta was postive.
What I didn't know is that pg feels the same way as AF coming on. Evil, isn't it? So, don't count yourself out yet. And, yes, Check trusts betas over POAS.
It's good that you are planning for the next cycle, but it's not over until the fat lady sings. Crossing my fingers for you.