I feel extremely sick whenever I leave my house, what can I do?

Unless you are truly physically sick it's probably conditioned response or anxiety and me personally I have dealt with debilitating agoraphobia and I won but it took a little time. I personally grounded myself and I got professional help.

There are multiple steps that can be found through the anxiety guide on 7 cups- I would recommend reading through to learn techniques to overcome these feelings

When I feel nervous leaving my house I like to take a friend with me so I feel safer. My friend is there to help me while I am out and if something happens

Whenever I have to leave the house and feel anxious and sick about it I try to listen to music to keep me occupied as well as blocking out the noises around me and just focusing on where I am headed and what I am listening to. The songs can be personal, something you find comfort in listening to etc. Another thing that I sometimes do is call someone that knows about my anxiety and talk to them during the walk (if it is a walk) to create the illusion that I am not alone. A cup of tea might also be good to settle the stomach but if the sickness is caused by anxiety as it is often in my case it sometimes works to tune out of f the world as I move from place to place.

one should try yoga or meditation for getting relieve from all those fears... its only us how can overcome our fears or sickness

Small steps, try going to the mailbox first, sit outside your front door and breath in deep breathes, get a feel of the environment, once your comfortable walk around the block, -avoid large crowds until your ready

Go to your GP and ask if this is a system of any disorders. Talk to people about how you're feeling and ask for advise.

Can you maybe think of any reason why you may be feeling un-well? It could be a sense of nervousness.

You could try taking deep breaths, I know it sounds cliche but just stopping a taking deep breaths and being in tune with your surroundings really helps. Also before leaving home sometimes I like like to mentally prepare myself for what's outside and do a bit of breathing exercises to calm myself. I make it a point to leave the house in a positive mood.

Depending on if it's actual physical sickness then I'd recommend seeing a doctor, but if it's just because you miss people and how calm and relaxed everything is when you're home it's most likely being homesick, everyone gets it and it's nothing to worry about.