Every now and then I get a feeling I want to be sick or I feel sick. This is one of my biggest fears and keeps me awake.
I havent eaten anything that would upset my stomach and I dont think I've been around anyone who is ill.
how can I control this fear? It prevents me from sleeping and it really upsets me.
24 years of age and im crying because I dont want to be sick... all I need is for someone to tell me I will be ok...
please help please 
I would first confirm that you are not taking any medications you could be reacting to. Then I would request a CBC (complete blood count) to see if you may be reacting to mold or some other environmental poison that is making you feel ill. If nothing shows up there, and to get that order you would have to see a doctor, I would see a therapist and be open about your free floating anxiety. A lot of people have anxiety and take medication for it as well as talk to someone. They just don't advertise it. Just know you don't have to live like this.
I used to get this when I was a teenager first away from home at university. Even reading about vomiting (I was studying medicine) made me have to put the book down and go and lie down. After many months I realised that I wasn't actually being sick, and gradually started to regain a little control. CBT may help you here as this is a very real and common condition called emetophobia and responds well to CBT.
regards
james.
You will be and are ok train your brain to think different happier thoughts your ok really xx