Headaches out of no where

I have been experiencing there midday headaches, migraine like in nature.  The occur around 3pm and I cannot seem to track their occurrence.  The only pattern is those are the days I miss out on my morning snack due to work related schedules.  I do have a afternoon snack, but it does not help and the headaches are debilitating.  Also, three times after my dinner meal I have being extremely sleepy and seem forced to go to bed.  I go to sleep around 7 or 8pm and sleep all night until 6pm the next morning.

I have checked support sites and got nothing.  My doctor’s appointment is in a few weeks, so I will continue to track to provide her with a pattern.