I posted my questions about my missed FP last weekend. Early this morning, I went to local USCIS ASC, and I explained the reason that I received the FP notice late so as to miss the FP appointment time. Fortunately, they allowed to take FP right away. So, don't worry in case you miss the FP appoinment time, just try to get there as early as possible.
Also, I would like to thanks Xiaobaitu and other friends' sugegstions and make me feel relaxed for last several days.