One banana and some nut butter is not a normal lunch. Take with you some real food for lunch. Also, that constitutes to a lot of nuts overall, and a banana has 45 gr of net carbs alone (about 50 to 70 net gr of carbs should be your goal for the whole day). In my opinion, you're not eating a lot of what you should be eating (do you eat fish/shellfish? Some berries?).

Finally, give it some time for your body to adjust. It's only been 2 weeks.

i say lift heavy an up your calories (sounds counter-intuitive but it looks like you're fighting a HUGE deficit). try eating more meat, fowl, and fish. bananas and nut butter aren't all that nutrient dense and you need more protein at lunch time. half a sweet potato with butter or coconut oil and a hunk of flesh should do the trick.

As for the bloating, you might not be an egg person - they are super gassy for me. I switched to meat and veg in the morning and my stomach is much happier for it.

Bananas and nut butter are also not a real lunch, and can be gassy. Eat more meat and veg for lunch. Get used to making enough for leftovers.

I agree with all the above answers. Definitely limit, if not cut out, the nuts and banana until you notice a difference. I also really really do not suggest weighing yourself. If you're working out then you are definitely gaining muscle mass which weighs more than fat does. I suggest you start taking your measurements instead, like around you waist and thighs and such. That is where you will see an actual difference.

You're not drinking enough water. The key to your success is hydration. The water also helps to keep you clean, move your bowel movements along. And meals aren't balanced.

My Paleo day...

This morning, 1/2 a chicken breast and a boiled egg.
mid morning snack, almonds and natural apple sauce. Mexican meatloaf with paleo pumpkin cupcake mid afternoon snack, pumpkin cupcake Dinner - Mexican meatloaf Late snack

LOTS of water all day long.

Not sure if this was said, but a common issue when transitioning to paleo- depending, of course, on what your diet was like before- is digestive distress because your body isn't producing as much stomach acid/digestive enzymes as it should be. I didn't think I should have to add these (HCL and a Digestive enzyme) but when I did I noticed an AMAZING shift in the way I was feeling. Bloating and digestive issues eased up and I had so much more energy.

YES EAT MORE! You need more paleo carb sources, thats why your craving the gluten-free grains etc. But don't skimp on the fat either. And a dash of protein..

I've been doing Paleo for two weeks and I've lost 13 lbs so far! My husband and I started it out along with counting calories (we use myfitnesspal). My Paleo friends think I'm nuts, because your body should know when to stop. But I'm pretty sure letting my body eat whatever and whenever is what got me overweight in the first place! I stopped counting after a week as I realized I was going WAY under the suggested calorie intake and would end up eating a 200+ calorie snack after dinner. But in my opinion, doing a calorie tracker will give you perspective on how much you actually do eat. I've heard over and over (even on Biggest Loser) if you don't eat enough you WILL NOT lose weight. My mom did Weight Watchers 15 years ago and she immediately lost weight just by starting to eat breakfast! My question to you would be, do you have much weight to lose? I personally need to lose 35 lbs to be at a healthy weight. But if you don't have that much to lose (other than a personal goal) that may be a factor too. I believe the idea for Paleo is for your body as a whole to be healthy, and weight loss is a reaction to that.

You are almost certainly malnourished from your diet, which will only drive up hunger and stop healthy weight loss. Plug your diet into a service like cronometer.com and you'll get a general idea of how nourishing and balanced your diet is.