I don't know how your relationship with Shawn and Gus is. Otherwise, it sounds like an anxiety dream about something. Good thing is that you wake up from your dream. If you want to try and nail it to something specific in your diet or daily routine, try to estimate in which sleep cycle you remember your dream. To do so:

Remember/write down your bedtime
When you wake up from this dream, check the time
Write down the time
In the morning, subtract the bedtime from the dream time and divide by 1.5 hours to get the sleep cycle number when you see this dream.
(dream awakening time-bedtime)/1.5 = sleep cycle number.

If this dream is caused by something that you eat upsetting your nervous system, this would be more pronounced during the first half of the night, as it takes about 8 hours to absorb 90% of the nutrients out of a meal. This may also help if one of your hormonal systems is at play. Various hormones peak and fall in the human body over the course of the 24 hours. It is possible that at one particular point in the night you happen to be dreaming and your body goes through hormonal changes.

I don't know more information about your sleep /wake pattern to suggest anything else.