There's defininly something you haven't done since you're stuck in the timeblock.
You don't have to do stuff in a specific order, but there are trigger-actions you HAVE to do before you finish the timeblock.
-Revisit all locations.
-Look at and interact with everything.
-Talk to people
-Check your inventory and look at or interact with everything in your pockets.
Following a walkthrough may some times be a nuisance if you fail to read a couple of words or skip a line, since they tend to be written very linear.
If you need help, use UHS-hints to get out of a stuck situation instead of reading a complete walkthrough. It doesn't ruin the game as much as a standard walkthrough and you can choose what you wish to reveal.
No, I have 42 out of 40 points for the time period, and have definitely done everything - I've looked at many different walkthrus for checklists. I did find another post from another person with a similar problem - after I posted this question. I believe it's a bug I triggered by not making the phone call before another action, probably talking to the two women at the museum... I guess I'll restart. At least it's only the beginning of the game. *sigh* The other 2 times I played this game I probably did things more in sequence, having had the graphic novel material in front of me.