I loved the ending. It was so sweet.

Although I wonder how much EITHER Lois or Clark will put into their marriage this time because they were forced into it by their future selves, rather than Navance. (At least that's how the younger Lois and Clark will see it

As far as the pregnacy, I'm expecting it, because of the story dramatics. But I think this is a little to early to tell either way. And I wouldn't read much into the fact that she wanted Chinese food last night and pasta this night. ANYONE would be pretty hungry if they hadn't eaten all day.
Of course, now that they've made love at least twice this night (I can't figure out whether it was two or three times on the beach), there's a possibity she just got pregnant this night.