WW, just 2 thoughts come to mind:
1) FETs can sometimes implant later than fresh embryos, so even though your usual pattern is early implantation, this embie could be lagging a little behind as a result of having been frozen.
2) If it really is a BFN cycle and you don't want to deal with the clinic, then it's okay to hide under a rock for a little while. BUT, be sure to set yourself a time limit (eg 2 days, 1 week, etc) and stick to it, so you're not letting those negative feelings fester forever (because that's not healthy)... You do have to deal with them eventually or they will make your life miserable.