Anxiety at night

I get anxiety very bad in the night I always feel like I'm unwell and going to throw up but I never do, and I have a phobia of it. What can I do I've played games on my phone and that's worked but every time I try to sleep it comes back. I've had medication for it from my doctor but it's useless. I think it's in my head but I've had it for years I'm very unhappy I just want it to go so I can enjoy my life I can't even cuddle up with my boyfriend to sleep I have to sit up until i fall asleep. I drink cold water, have a fan on and a cold wet flannel but I'm so sick of doing it every night.