I hear you
snowy, Xerxys to the rescue.
First, I was about to suggest that you don't eat through the day but in light of your GERD (just googled it), I have to say carry on but there is a way around that.
Now, I was in boarding school and for some reason in school a teenager consumes twice his/her body weight a day. We would wake up and be in class by 6am, read, eat at 7am. Read, eat at 10am, class, lunch at 1pm, class, break at 4pm, supper at 7pm. This established a cycle for me. The cycle, of course was demolished after I left high school. I intend to get it back.
What time do you get up? Run every morning. An hour later you'll be hungry, then eat..., anything. Eat at break periods and at lunch and at supper. In between meals can be small.
Out of topic though, how much coffee do you consume? Do you have it with milk? If it's a lot and without milk, do you think this can cause your GERD? Acidic foods can be balanced out without necessarily eating to keep your contents down.