Snow I sending you so many hugs right now but please don't give up yet. Just because you got a positive opk doesn't mean you necessarily conceived on that date. It could have happened a couple of days later, or you might not have even ovulated at that date. OPKS only tell you that you are about to ovulate, not that you actually have. I know it's hard , but try not to make any decision until after your next blood tests. Its quite common for women to measure much, much smaller than you would expect at this stage and things still turn out okay. I'll wait with you until Thursday's results. I'm here sending all my love and support to you right now. xxxx