Please help with bmr/tdee, Obese, 12days Not losing :(

Sodium and too much fruit were my biggest issues when it came to not being able to lose weight, bloat, fat.

My nutritionist took a look at my diary for a week and noted that I was eating too much fruit. Yes... fruit is really good for you and you should have the appropriate amount of servings but, sugar is sugar and your body doesn't know the difference. The mistake I was making was eating too much fruit at night. But that's me, we are all different. I just thought it was worth a mention. I only do some blueberries and/or blackberries and/or strawberries in the morning with my yogurt and that's it for the day. About a half a serving. That worked. Also, the sodium was making me bloated even though I drink enough water.

If you've done 5 days of exercise that you normally would not do that is likely the culprit.

When you start a new exercise routine (or for seasoned exercisers, when you switch it up or increase intensity), your muscles will protest. They will hold on to water to both cushion and repair themselves. This will often show up either as an actual GAIN of weight, or as a "no-loss" situation as you are describing (where you have lost some but you can't see it on the scale due to the retained water weight). It will dissipate as your muscles get used to the exercise and you'll see the loss show up. Give it some more time, 12 days is not long enough to be wanting to throw in the towel already. Did you get obese in 12 days? Then why expect to see dramatic loss in that amount of time? Be realistic.

Are you weighing and measuring your food? Deficit = weight loss. If you're not losing your not eating at a deficit.

The OP hasn't been doing this long enough to make the assumption. Water retention, sodium and carb level can all masked fat loss. I agree we do need to know if the OP is using a food scale and probably should see if the OP will open her food diary.

It's only been 12 days. Stick with it - if your calculations are right and you are logging everything after weighing it then the weight will come off. If after a month you don't see any weight loss try chatting with a doctor or opening your diary for some feedback from MFP. Make sure you are weighing your food and checking that the nutrition labels on your food have similar information to what is in the database - there are a few things that I've found where calories are way underreported in the database and if they're your staple foods then you could be underestimating your intake.

You have to adjust your numbers for actual results, but the Katch McArdle is typically the most accurate if you have a decent body fat estimate. The others often overstate calories needed for people who need to lose weight.

The calculator I'm looking at gives a TDEE of 1687 for 3 days/week exercise. If you are only just starting, I think that's a fair estimate, as it probably takes time to work up to more intense exercise.

What that--as well as the numbers you are giving--indicate is that your margins are going to be kind of low. Even at 1200 and no logging errors you'd be losing only about 1 lb/week or just under. That, plus the fact that sometimes people don't do the big drop off, but start slow, and the fact that you are adding in exercise which can cause water to be retained, not to mention the fact it's only been 12 days and there's usually some kind of monthly pattern that you don't know yet, makes me think that just staying the course is probably the answer.

One thing, though, is that it is a narrow margin, so you might want to have people check on your logging. Errors such as choosing the wrong entries (it takes a while to be able to recognize these easily) could be blowing your deficit.

OP, 12 days isn't long enough to decide whether or not it's working. Stick with it for 4-6 weeks and then re-evaluate. (If you're doing something that you can't maintain for 4-6 weeks, that's a major problem). During that time, make sure you're tracking your intake as accurately as possible. That means using a food scale or, at the very least, measuring cups and spoons for everything.