Two years ago I went to an army recruitement centre and during my entry in the centre a soldier on the gate asked me several Islamic information questions ;among them he asked me the question that "About who the Holy Prophet (SAWW) said that he would have been the prophet after me if there was another prophet after me, and I in fear and to avoid him as he was a "sunni" answerd him "Umer" knowing that the answer was "Imam Ali A.S". Now I am ashamed of my cowardness and seek your guidence about it.

1- There is no prophet after Prophet Mohammad (s). There are only successors after the Prophet (s).

2- If you were under fear for any reason, it’s ok that you answered that. Don’t worry and don’t blame yourself. Ask Allah for strength in your faith and to guide that person and you will be ok.