getting fustrated

You may have lost fat but gained some water from working out. Like @smit7633 said, give it at least 4 weeks. If you haven't lost by then, take a serious look at your logging. Are you accurately logging every bite? Are you over-estimating your activity? Even small errors can add up to put you on the wrong side of the scale.

As others have said give it time and log accurately.

If you are eating back calories earned through exercise I would stop doing that and just try to keep your calorie intake at or below your MFP allowance.

I have found that the estimated calorie burn on MFP seems way too high and, as a rule of thumb, I generally divide the MFP estimate by two when logging.

I tend to eat packaged foods with calorie details I can scan using the MFP mobile app. This means that I have a very good record of what I am eating. I am not good with weighing stuff! - if you are making meals from scratch then get a decent set of scales to weigh stuff.

It took me quite a while to find what works for me.

Keep at it and the loss will come.

Indeed, you could quite easily consume a surplus of 'clean' food. Some people tend to get focused too much on so called clean eating and pay no attention to how much they're eating because they think if the food is 'clean', they can eat more of it because if food is good for you, then the more of it you eat the better, right?