Woke up suddenly think it's gonna happen

It's nearly 2am where I am I'm freaking out I feel so nauseous my stomach don't feel right it didn't feel right yesterday either I still ate yesterday and now I wish I didn't. Also when I was younger whenever I was ill I used to wake up in the night so when this happens I freak out I really feel like it's gonna happen I can't explain it my stomach just feels really off like it's gurgling and a bit gassy I'm so scared, also my stomach sort of feels like it's burning :'( I'm so scared