I recently started my ***clean*** bulking phase for the winter and the first bulking phase I have ever done. I started on August 21st and my weight that morning was 164 lbs. Currently I am weighing in at around 178 and I really haven't lost much definition (gained much fat). 

Recently though my stomach has constantly been upset. I never want to eat and have to force myself to do so. Below is a breakdown of my diet. Is there anything in my diet or any ideas as to why I'm feeling poorly so often?

~5000 Calories per day
![enter image description here](https://i.stack.imgur.com/cPEQ1.png)

\*All nuts are unsalted

**A little information about my lifestyle:**

I drink at least 1.5 gallons of water a day. 

I sit a desk all day and that's generally when it is the worst. While I'm at the gym It's never upset, but sitting down at work it is usually pretty bad. I'm happy with my gains, but eating this much food is really difficult.

MY SUPPLEMENTS 

* [Optimum Serious Mass](http://www.bodybuilding.com/store/opt/sm.html)
* [Optimum Whey](http://www.bodybuilding.com/store/opt/whey.html)
* [Optimum Casein](http://www.bodybuilding.com/store/opt/cas.html)
* [Pre-workout C4](http://www.bodybuilding.com/store/cellucor/c4-extreme.html)