HELP - stuck in GTA V - bug?

Hoping somebody will be able to help me out with this, or it might just be a bug in the game. I got to the torture mission in GTA V. Once I completed it, everything seemed to slow way down - I don't mean literally, I just mean that no new missions opened up after I finished that one. I had side missions I could do, but none pertaining to the main storyline. I have run around for hours as each character, trying to figure out how to trigger a new mission, but NOTHING. It's driving me nuts and it's forced me to put down the game entirely. Any advice? Is it a glitch?

I even tried replaying the torture mission (something I did NOT want to do), and still nothing. I can't even figure out which mission is supposed to follow this one. I did some of the missions out of order, at least according to a site that lists them all in chronological order. Does that matter?

Please help! Thanks.

Do a side mission or two and then the story missions will continue. You should have an assassination mission to do for Lester. Probably 'Hotel Assassination'. Do that, and you'll be fine.

Tip: You can make a lot of money by making smart investments before the assassination missions. See here: http://gtaforums.com/topic/642910-guide-stock-market-assassination-missions-guide/

As for the list of missions you asked for, try this: http://gta.wikia.com/Missions_in_GTA_V