“What should I eat when bloated and have abdominal pressure?”

There are some OTC remedies for Bloating - but like all OTC meds are only for symptom relief and do not treat the underlying cause. It is wise to seek medical attention, if symptoms do not improve or persist or worsen.

It would help to have some more information about your symptoms, in particular, does the bloating happen after eating? This is what usually happens. If you get bloating after eating a meal, then the problem is almost always due to carbohydrate malabsorption. Thus, a straightforward solution is to lower the carbs in the diet. The Low FODMAP diet has been very helpful to reduce bloating. In general, the fewer carbs eaten, the less symptoms occur. Consider starting the Low FODMAP diet:
https://www.monashfodmap.com/ibs-central/i-have-ibs/starting-the-low-fodmap-diet/

If you have any weight loss, anemia, blood in the stool, or diarrhea, then it's best to see a GI doctor to get evaluated properly.