2000 calories a day is easy, my friend, EASY, i do this day in day out, without meal replacement powders, and I'm still hungry every day. Last Friday I ate over 3000 calories in my cheat meal. I don't think your problem is a small stomach, I think its lack of nutritional knowledge.Because my daily meals add up to only about 1500kcal
We need to see what you are eating again. Show us your exact meal plan and include the calorie and protein count.
Your age? But you could do this before when you were eating more cals...? So it's not your age, its that you have less energy due to eating less cals. You can fix this, easily.Another thing, I'm feeling the burn out after two sets and I must admit that on my last two weights-workout days I gave up after two sets, I felt disappointed in myself as that's never happened before. I even dropped my bench press weight by 10lbs and still felt like I didn't have the energy/will to do another set. Must be the age finally creeping up on me.