I feel so bad that you've had to wait so long for AF. Ironic, when you don't want AF, it shows. When you're waiting, and waiting, and waiting, NOTHING...
Did you have your levels done after the procedure to make sure your hormones are <5? If so, then I'd test and see. I'm assuming after weeks it would be down to zero, but, I don't know what they were to start with...
OK, I'm being of no help. Yes, it is possible that you are PG. It only takes one swimmer to make it to the egg!
Keep us posted. And, good luck. I hope your dream of a BFP comes true!!!