When the pressures and daily demands become so great and you feel like you are losing control, it can have a negative effect on you physically and emotionally. What you need are coping strategies that you can incorporate into your life.  
Here are some suggestions that you can try.
- Write down the things that are causing your stress. After you have your list, look at them one by one, and figure an approach to cope with it. Things seem overwhelming when you feel like you have to take care of everything all at once. However, when you handle each stressor in your life individually, you can prioritize and take care of each one separately, each one in its own time. This will give you back a sense of control so you won't be stressed out.
- Are you getting enough sleep? It's tempting to sacrifice sleep in order to get one more thing done. However, if your body is tired, you will not be able to handle pressure as well.
- Are you eating right? Make sure that your body has the fuel to handle your daily demands. There are certain foods that you can eat which may help in stress relief. 
- Set aside some quiet time for yourself. Listen to music or go for a walk. Do some light exercise so your body will produce more endorphins, the "feel good" hormone. It will help your mind reset so that you can tackle your pressures with new energy.
It's important to remember to take care of yourself first when you start feeling overwhelmed and stressed out. Don't sacrifice your own needs if it results in a negative impact. When you take care of yourself, you can take care of others much better.