If the finger is back in place, and you are threaded correctly, more than likely you have a tiny bit of thread still trapped in the bobbin area from your thread nest incident. I personally would remove the thread for now, needle too and just work on finding the jam. You may have to take the bobbin area apart and clean thoroughly to find it. Once you have things working again, double check the finger is in the right place and re-thread the machine to try.