something wrong with my betta pllzzzz help

If you could also fill this info sheet out it will also help members on her current condition.

Housing
What size is your tank?
What temperature is your tank?
Does your tank have a filter?
Does your tank have an air stone or other type of aeration?
Is your tank heated?
What tank mates does your betta fish live with?

Food
What type of food do you feed your betta fish?
How often do you feed your betta fish?

Maintenance
How often do you perform a water change?
What percentage of the water do you change when you perform a water change?
What type of additives do you add to the water when you perform a water change?

Water Parameters:
Have you tested your water? If so, what are the following parameters?

Ammonia:
Nitrite:
Nitrate:
pH:

Symptoms and Treatment
How has your betta fish's appearance changed?
How has your betta fish's behavior changed?
When did you start noticing the symptoms?
Have you started treating your fish? If so, how?
Does your fish have any history of being ill?
How old is your fish (approximately)?

well my betta don't poo for 2 days, also she always struggle like shes experiencing some pain ><
i just try to breed her. she show 3 white vertical lines on the body but the breed was not successful, she just keep refusing and flow on the surface of the water..

Housing :
What size is your tank?10 gallon tank
What temperature is your tank?25
Does your tank have a filter?sponge filter
Does your tank have an air stone or other type of aeration?
Is your tank heated? no
What tank mates does your betta fish live with? none

Food
What type of food do you feed your betta fish? a mix of brime shrimp and atison's betta pro (pellets)
How often do you feed your betta fish? twice a day. one meal with brime shrimp one meal with a pellet

Maintenance
How often do you perform a water change? twice a week
What percentage of the water do you change when you perform a water change?40%
What type of additives do you add to the water when you perform a water change? water conditioner ,indian almond leaf

Water Parameters:
Have you tested your water? If so, what are the following parameters?

Ammonia:0.25mg/L
Nitrite:
Nitrate:
pH:6.5

Ok thanks, well I don't see anything obvious, and the fact she wont breed does not mean she is unhealthy. However if she is slightly constipated which it sounds like she could be, then I think we can look at her diet a little. I don't know anything about the Atisons pellets but a good quality pellet should have the first two ingreadients being a fish form. if you have one then a grain or maze then the food is not a very good one and full of fillers likely to cause constipation. The two most recommended foods here are the New Life Spectrum, Betta pellets and the Omega one, Betta buffet pellets. Also if your girl does suffer constipation it can help to pre soak the pellets in a cup of a small amount of tank water for about a minute before feeding this will soften them up and hopefully prevent her from getting constipated.

Frozen Daphnia is another good food that can help keep things moving as it can act as a laxative for her.

For your size tank I think one water change a week once the Ammonia, Nitrite is settling at zero will be fine. With your slight ammonia reading you could look at using Seachems prime water conditioner as that will detoxify the Ammonia and any Nitrites, and can be added to the tank a drop per gallon to keep ammonia and nitrites locked up.