What can cause severe bloating/belching right after i eat. pressure and pain in chest as well. seems like food won't digest.

Bloating/belching: A variety of structural and/or functional conditions may account for your symptoms, from esophageal to gastric, specifically severe reflux, hiatal hernia, gastric ulcer or gastritis to gallbladder dysfunction/ gallstones to name the most common seen in practice. Definitely worth a visit with your PCP trying to identify the best next diagnostic step.