Going by tone alone...I think I MIGHT know who you mean. Like I can't say for sure but... He wasn't exactly the worst person to talk to and might shed some light on some of this, or the two of you could figure that out.
...Yeah, okay, I'd freak out too if I found out I was somebody's father I didn't remember but I get the impression that's not completely Superman's M.O, so if that's really him...might not be that bad of an idea.
I mean, okay, in my case, I freaked out about telling Oliver the whole truth, and he doesn't even know all of it still, but the parts I finally mentioned? It helps when somebody believes you and they're a rational and sane person. I'd maybe give that a try.