how much caffeine do you take? caffeine has a half life of 2-3 hours in an adult. There is 54mg of caffeine in a 12oz mt dew. 380mg caffeine in a 12oz starbucks coffee.

I use some fat free yogurt before i workout to get simple carbs and it seems to digest fast with me and doesn't cause me to get sick when i'm working out.

Also, are you just doing a chest workout every 3 days? it seems like that is your entire workout. If you want to gain mass all over you need to hit your back and legs. It WILL put strength in your chest to increase your overall body strength. The back needs to be worked also to balance the chest out otherwise it won't be in harmony and could reduce the effectiveness of the chest muscles.