When Barry went back to save his mother in season 1, he was hiding in a room and when he was about to go out, there was a Flash who signaled at him to not do it, to not save her. But when he went back in time to save his mother at the end of season 2, that specific Flash was not there anymore. I'm assuming he must have come from a further future, and he has experienced Flashpoint and the events post-Flashpoint to know that saving Nora Allen and getting her killed again would later cause Caitlin to become Killer Frost and Cisco to lose his brother and some other mess.
Which is why - I think - he raced back to the night Nora died to tell Barry from before Flashpoint to not save his mother. I'm wondering if anyone knows what happened to that Future Flash, just in case I miss anything from season 3. Please help. Thank you.