Female Betta with Chronic SBD

Housing
What size is your tank? 2.5 gallon
What temperature is your tank? 80F
Does your tank have a filter? yes
Does your tank have an air stone or other type of aeration? no
Is your tank heated? yes
What tank mates does your betta fish live with? none

Food
What type of food do you feed your betta fish? crushed pellets
What BRAND of food do you feed it? Omega One
How often do you feed your betta fish? every other day (i'll explain this below)
How MUCH do you give at each feeding? about 1-1.5 (i'll explain this below)

Maintenance
How often do you perform a water change? twice weekly
What percentage of the water do you change when you perform a water change?
50%. once a week gravel cleaning. one a month a larger water change.
What type of additives do you add to the water when you perform a water change? Prime + less then 1/4 of a teaspoon of epsom salt

Water Parameters:
Have you tested your water? If so, what are the following parameters? - yes
Ammonia: 0
Nitrite:0
Nitrate:0
pH: neutral
Hardness: n/a
Alkalinity: n/a

So I bought a very small female VT about 10 months ago from Petco. She seems so stressed and bloated. Since I have brought her home she has SBD problems. They are fairly mild. A few days a week she will be bloated and floating to the top. After having her months I figured out that I can't feed her more than every other day otherwise her SBD gets much worse. I also feed her crushed pellets because the pellets themselves are too big for her. If I feed her more than 1-1.5 pellets then she will become bloated as well. She also becomes bloated if I remove the epson salt from her tank. I am trying to remove it slowly be decreasing the dosage over time.

I'm starting to think that maybe something else is wrong with her. I don't see her poop often but when i do, it is about a light tan/brown color and doesn't seem stringy at all. I have API General Cure, should I try to use it and see if it helps? If not, is there something else I should try? anyone have any advice for me?