I feel like I have trouble breathing like my chest is being sat on all the time and my stomach aches a lot also when I urinate it stings sometimes?

Lots of issues. There are a lot of issues that you bring up that should be evaluated by a physician. Trouble breathing can go with asthma or possibly something cardiac. Multiple reasons why your belly might hurt, the painful urination can go with a UTI. Get evaluated.
Here are some ... Not knowing your age and additional medical background, you should seek urgent medical attention to make sure of no urgent cardiopulmonary troubles such as MI, asthma, CHF, etc. as the priority of care. So, go to clear current urgent concern.