Whats a good HIT routine for losing weight?

I recently started to go back to the gym because the stress from work has been piling up and leading to me getting a little more fluffy then what I'm comfortable with.

I started a 3 exercise 5x5 alternating routine and am thinking of adding a quick HIT circuit for after to really start to burn my belly fat, any good routines out there?

For reference...

I try to go to the gym about 3-4 times a week

My 5x5 exercises are

- Squat, Bench, Barbell Row

- Squat, Overhead Press, Deadlift

I've been doing it for about 2 weeks, and while I have been going up in weight, I don't feel I'm losing anything and feel pretty bloated.