Mens Clothes (Granton EH5)

This is really embarrassing to even ask but I’m in need of clothes. Due to healthcare conditions, my weight fluctuates between sizes and being on such a low income, buying clothes is nigh on impossible- I can only really wear joggers/tracksuit bottoms with elasticated waists (I have gastrointestinal disorders.) I need bigger size tops to cover up my tummy. I tend to wear oversized jogging bottoms and hoodies to cover up the state I’ve found myself in. My health has really affected my wellbeing- I only go to Drs appointments, hospital appointments and psychology once a week. Any help would be serious may appreciated.