What am I doing wrong ??

I’ve never been heavier than 100 lbs unless I was pregnant. Currently I’m 95lbs with a BMI of 17.3. No matter how much I eat it seems like I’m just not gaining. Here’s a look into a normal day of eating for me:

Breakfast, I ate an egg and cheese sandwich on two pieces of whole wheat toast, with two eggs and one slice of Colby jack cheese. I also had 1 small bottle of strawberry banana body armor. A small dish of strawberries and blackberries

For lunch I ate 1 turkey and lettuce spinach wrap with mayo and mustard.

When I got home from work I had a small serving of leftover chicken and gnocchi that had a Parmesan sauce.

and for dinner I had 8 stalks of asparagus, one honey garlic salmon, and half a bag of Ben’s original cheddar broccoli rice.

Also today: 4 bottles of ice mountain, 1 glass of milk, 1 serving of actavia blueberry yogurt, 1 3 oz glass of apple juice.

And it pretty much goes like this. I like to pair all snacks and meals with some sort of protein and dairy, a whole wheat or gain, and either fruit or veggies. I don’t really work out or be more active much other than my job (nursing)