Blood, nitrites and leucocytes
all suggest presence of infection. however since you have already taken antibiotics for 7 days mostly your UTI must have resolved. Please get your urine tested again to confirm if UTI has resolved. Even concentrated urine can give bad odour. Your kidneys must be functioning well but to confirm get kidney function test done. Bloating
sensation in stomach could be a side effect of antibiotic. High fibre diet and lentils can cause flatulance. Dont worry you will be alright.
wish you well