Hello~I agree with the other poster, you are not digesting your food properly, adding a good, high potency probiotic would benefit you greatly, also a good multi mineral and vitamin supplement.
Have you been tested for food allergies, if not, it might be a good idea to suggest to your PCP, many times food allergies and sensitivities can cause bloating.
You're not digesting food efficiently.
The reason you aren't bloated in bthe morning is because you went probably 10 hours without a meal. Maybe you would benefit from probiotics, or magnesium (which helps your intestines move food along). You could also have a certain type of food that bloats you, like dairy products or wheat products.