I’m Constantly Irrationally Stressed And Depressed And Feel No Drive

I’m constantly irrationally stressed and depressed and feel no drive to do anything and most of the time I feel complete apathy. Also I get aggressive and angered by very little. Sometimes I feel insane. I’ve been on multiple SSRIs that all helped, especially duloxotine but stopped due to unbearable side effects. I’ve been looking into it a lot and I think I have a gut infection causing low dopamine levels. I’m thinking I might have gastritis as I can barley eat anything without feeling sick to my stomach and I have to force my self to eat or I won’t. Is this a possibility and an explanation and if so what can I do.